fix: make preload calculation identical between sandbox & non-sandboxed (#34531)

lib/browser/rpc-server.ts

@@ -68,6 +68,10 @@ ipcMainUtils.handleSync(IPC_MESSAGES.BROWSER_SANDBOX_LOAD, async function (event
   };
 });
 
+ipcMainUtils.handleSync(IPC_MESSAGES.BROWSER_NONSANDBOX_LOAD, function (event) {
+  return { preloadPaths: event.sender._getPreloadPaths() };
+});
+
 ipcMainInternal.on(IPC_MESSAGES.BROWSER_PRELOAD_ERROR, function (event, preloadPath: string, error: Error) {
   event.sender.emit('preload-error', event, preloadPath, error);
 });

lib/common/ipc-messages.ts

@@ -3,6 +3,7 @@ export const enum IPC_MESSAGES {
   BROWSER_GET_LAST_WEB_PREFERENCES = 'BROWSER_GET_LAST_WEB_PREFERENCES',
   BROWSER_PRELOAD_ERROR = 'BROWSER_PRELOAD_ERROR',
   BROWSER_SANDBOX_LOAD = 'BROWSER_SANDBOX_LOAD',
+  BROWSER_NONSANDBOX_LOAD = 'BROWSER_NONSANDBOX_LOAD',
   BROWSER_WINDOW_CLOSE = 'BROWSER_WINDOW_CLOSE',
   BROWSER_GET_PROCESS_MEMORY_INFO = 'BROWSER_GET_PROCESS_MEMORY_INFO',
 

lib/renderer/init.ts

@@ -2,6 +2,7 @@ import * as path from 'path';
 import { IPC_MESSAGES } from '@electron/internal/common/ipc-messages';
 
 import type * as ipcRendererInternalModule from '@electron/internal/renderer/ipc-renderer-internal';
+import type * as ipcRendererUtilsModule from '@electron/internal/renderer/ipc-renderer-internal-utils';
 
 const Module = require('module');
 
@@ -38,6 +39,7 @@ require('../common/reset-search-paths');
 require('@electron/internal/common/init');
 
 const { ipcRendererInternal } = require('@electron/internal/renderer/ipc-renderer-internal') as typeof ipcRendererInternalModule;
+const ipcRendererUtils = require('@electron/internal/renderer/ipc-renderer-internal-utils') as typeof ipcRendererUtilsModule;
 
 process.getProcessMemoryInfo = () => {
   return ipcRendererInternal.invoke<Electron.ProcessMemoryInfo>(IPC_MESSAGES.BROWSER_GET_PROCESS_MEMORY_INFO);
@@ -48,15 +50,8 @@ const { hasSwitch, getSwitchValue } = process._linkedBinding('electron_common_co
 const { mainFrame } = process._linkedBinding('electron_renderer_web_frame');
 
 const nodeIntegration = mainFrame.getWebPreference('nodeIntegration');
-const preloadScript = mainFrame.getWebPreference('preload');
-const preloadScripts = mainFrame.getWebPreference('preloadScripts');
 const appPath = hasSwitch('app-path') ? getSwitchValue('app-path') : null;
 
-// The webContents preload script is loaded after the session preload scripts.
-if (preloadScript) {
-  preloadScripts.push(preloadScript);
-}
-
 // Common renderer initialization
 require('@electron/internal/renderer/common-init');
 
@@ -127,8 +122,9 @@ if (nodeIntegration) {
   }
 }
 
+const { preloadPaths } = ipcRendererUtils.invokeSync(IPC_MESSAGES.BROWSER_NONSANDBOX_LOAD);
 // Load the preload scripts.
-for (const preloadScript of preloadScripts) {
+for (const preloadScript of preloadPaths) {
   try {
     Module._load(preloadScript);
   } catch (error) {

patches/chromium/allow_in-process_windows_to_have_different_web_prefs.patch

@@ -8,10 +8,10 @@ WebPreferences of in-process child windows, rather than relying on
 process-level command line switches, as before.
 
 diff --git a/third_party/blink/common/web_preferences/web_preferences.cc b/third_party/blink/common/web_preferences/web_preferences.cc
-index 6d51f6a77c21b60ab756dbf8d4961b351a2e2b07..c6dc3cebfb32489a5e50b850ed02a066bf3f258e 100644
+index 6d51f6a77c21b60ab756dbf8d4961b351a2e2b07..26b820b3ce387e01900cec4227ff290113a833c3 100644
 --- a/third_party/blink/common/web_preferences/web_preferences.cc
 +++ b/third_party/blink/common/web_preferences/web_preferences.cc
-@@ -142,6 +142,20 @@ WebPreferences::WebPreferences()
+@@ -142,6 +142,19 @@ WebPreferences::WebPreferences()
        fake_no_alloc_direct_call_for_testing_enabled(false),
        v8_cache_options(blink::mojom::V8CacheOptions::kDefault),
        record_whole_document(false),
@@ -20,7 +20,6 @@ index 6d51f6a77c21b60ab756dbf8d4961b351a2e2b07..c6dc3cebfb32489a5e50b850ed02a066
 +      is_webview(false),
 +      hidden_page(false),
 +      offscreen(false),
-+      preload(base::FilePath::StringType()),
 +      node_integration(false),
 +      node_integration_in_worker(false),
 +      node_integration_in_sub_frames(false),
@@ -33,21 +32,10 @@ index 6d51f6a77c21b60ab756dbf8d4961b351a2e2b07..c6dc3cebfb32489a5e50b850ed02a066
        accelerated_video_decode_enabled(false),
        animation_policy(
 diff --git a/third_party/blink/common/web_preferences/web_preferences_mojom_traits.cc b/third_party/blink/common/web_preferences/web_preferences_mojom_traits.cc
-index 187fd8d9818693262256d5cbddd5e02659ba903d..f166517f4e70ced310253539fb6197f6b3af559c 100644
+index 187fd8d9818693262256d5cbddd5e02659ba903d..28e5178361e03d1ac851fa74214931b2332dd9c2 100644
 --- a/third_party/blink/common/web_preferences/web_preferences_mojom_traits.cc
 +++ b/third_party/blink/common/web_preferences/web_preferences_mojom_traits.cc
-@@ -23,6 +23,10 @@ bool StructTraits<blink::mojom::WebPreferencesDataView,
+@@ -148,6 +148,19 @@ bool StructTraits<blink::mojom::WebPreferencesDataView,
-       !data.ReadCursiveFontFamilyMap(&out->cursive_font_family_map) ||
-       !data.ReadFantasyFontFamilyMap(&out->fantasy_font_family_map) ||
-       !data.ReadMathFontFamilyMap(&out->math_font_family_map) ||
-+      // Begin Electron-specific WebPreferences.
-+      !data.ReadPreloads(&out->preloads) ||
-+      !data.ReadPreload(&out->preload) ||
-+      // End Electron-specific WebPreferences.
-       !data.ReadLazyFrameLoadingDistanceThresholdsPx(
-           &out->lazy_frame_loading_distance_thresholds_px) ||
-       !data.ReadLazyImageLoadingDistanceThresholdsPx(
-@@ -148,6 +152,19 @@ bool StructTraits<blink::mojom::WebPreferencesDataView,
        data.fake_no_alloc_direct_call_for_testing_enabled();
    out->v8_cache_options = data.v8_cache_options();
    out->record_whole_document = data.record_whole_document();
@@ -68,7 +56,7 @@ index 187fd8d9818693262256d5cbddd5e02659ba903d..f166517f4e70ced310253539fb6197f6
    out->accelerated_video_decode_enabled =
        data.accelerated_video_decode_enabled();
 diff --git a/third_party/blink/public/common/web_preferences/web_preferences.h b/third_party/blink/public/common/web_preferences/web_preferences.h
-index 59947bfd3c042e5f7d3993967fece9b519f93472..368ec7fb398409cd6386269934eaffcce356793f 100644
+index 59947bfd3c042e5f7d3993967fece9b519f93472..cb2a53f6147767394585ed371744d8a140aace71 100644
 --- a/third_party/blink/public/common/web_preferences/web_preferences.h
 +++ b/third_party/blink/public/common/web_preferences/web_preferences.h
 @@ -10,6 +10,7 @@
@@ -79,17 +67,15 @@ index 59947bfd3c042e5f7d3993967fece9b519f93472..368ec7fb398409cd6386269934eaffcc
  #include "net/nqe/effective_connection_type.h"
  #include "third_party/blink/public/common/common_export.h"
  #include "third_party/blink/public/mojom/css/preferred_color_scheme.mojom-shared.h"
-@@ -154,6 +155,22 @@ struct BLINK_COMMON_EXPORT WebPreferences {
+@@ -154,6 +155,20 @@ struct BLINK_COMMON_EXPORT WebPreferences {
    blink::mojom::V8CacheOptions v8_cache_options;
    bool record_whole_document;
  
 +  // Begin Electron-specific WebPreferences.
-+  std::vector<base::FilePath> preloads;
 +  bool context_isolation;
 +  bool is_webview;
 +  bool hidden_page;
 +  bool offscreen;
-+  base::FilePath preload;
 +  bool node_integration;
 +  bool node_integration_in_worker;
 +  bool node_integration_in_sub_frames;
@@ -103,7 +89,7 @@ index 59947bfd3c042e5f7d3993967fece9b519f93472..368ec7fb398409cd6386269934eaffcc
    // only controls whether or not the "document.cookie" field is properly
    // connected to the backing store, for instance if you wanted to be able to
 diff --git a/third_party/blink/public/common/web_preferences/web_preferences_mojom_traits.h b/third_party/blink/public/common/web_preferences/web_preferences_mojom_traits.h
-index bd425a5869477de9095c6a41c683609d065b08c0..3a5d7450aa40e8a7614e83f316d3d0fb59583381 100644
+index bd425a5869477de9095c6a41c683609d065b08c0..c7ba3ff52c9de01028c9e2be214e20cd91cbf309 100644
 --- a/third_party/blink/public/common/web_preferences/web_preferences_mojom_traits.h
 +++ b/third_party/blink/public/common/web_preferences/web_preferences_mojom_traits.h
 @@ -6,6 +6,7 @@
@@ -114,15 +100,11 @@ index bd425a5869477de9095c6a41c683609d065b08c0..3a5d7450aa40e8a7614e83f316d3d0fb
  #include "mojo/public/cpp/bindings/struct_traits.h"
  #include "net/nqe/effective_connection_type.h"
  #include "third_party/blink/public/common/common_export.h"
-@@ -428,6 +429,60 @@ struct BLINK_COMMON_EXPORT StructTraits<blink::mojom::WebPreferencesDataView,
+@@ -428,6 +429,52 @@ struct BLINK_COMMON_EXPORT StructTraits<blink::mojom::WebPreferencesDataView,
      return r.record_whole_document;
    }
  
 +  // Begin Electron-specific WebPreferences.
-+  static const std::vector<base::FilePath>& preloads(const blink::web_pref::WebPreferences& r) {
-+    return r.preloads;
-+  }
-+
 +  static bool context_isolation(const blink::web_pref::WebPreferences& r) {
 +    return r.context_isolation;
 +  }
@@ -139,10 +121,6 @@ index bd425a5869477de9095c6a41c683609d065b08c0..3a5d7450aa40e8a7614e83f316d3d0fb
 +    return r.offscreen;
 +  }
 +
-+  static const base::FilePath& preload(const blink::web_pref::WebPreferences& r) {
-+    return r.preload;
-+  }
-+
 +  static bool node_integration(const blink::web_pref::WebPreferences& r) {
 +    return r.node_integration;
 +  }
@@ -176,7 +154,7 @@ index bd425a5869477de9095c6a41c683609d065b08c0..3a5d7450aa40e8a7614e83f316d3d0fb
      return r.cookie_enabled;
    }
 diff --git a/third_party/blink/public/mojom/webpreferences/web_preferences.mojom b/third_party/blink/public/mojom/webpreferences/web_preferences.mojom
-index 738ac646e075f7a37ba2a263c7799a755e63d3fb..80d6ae17d34ef5c7fd14e21c4e1ee3ed4ef9c5fe 100644
+index 738ac646e075f7a37ba2a263c7799a755e63d3fb..40ab2a4b9a1f9de5f201502adebc166a48fccd35 100644
 --- a/third_party/blink/public/mojom/webpreferences/web_preferences.mojom
 +++ b/third_party/blink/public/mojom/webpreferences/web_preferences.mojom
 @@ -10,6 +10,7 @@ import "third_party/blink/public/mojom/v8_cache_options.mojom";
@@ -187,17 +165,15 @@ index 738ac646e075f7a37ba2a263c7799a755e63d3fb..80d6ae17d34ef5c7fd14e21c4e1ee3ed
  
  enum PointerType {
    kPointerNone                              = 1,             // 1 << 0
-@@ -206,6 +207,22 @@ struct WebPreferences {
+@@ -206,6 +207,20 @@ struct WebPreferences {
    V8CacheOptions v8_cache_options;
    bool record_whole_document;
  
 +  // Begin Electron-specific WebPreferences.
-+  array<mojo_base.mojom.FilePath> preloads;
 +  bool context_isolation;
 +  bool is_webview;
 +  bool hidden_page;
 +  bool offscreen;
-+  mojo_base.mojom.FilePath preload;
 +  bool node_integration;
 +  bool node_integration_in_worker;
 +  bool node_integration_in_sub_frames;

shell/browser/electron_browser_client.cc

@@ -497,11 +497,6 @@ void ElectronBrowserClient::OverrideWebkitPrefs(
           ? blink::mojom::PreferredColorScheme::kDark
           : blink::mojom::PreferredColorScheme::kLight;
 
-  auto preloads =
-      SessionPreferences::GetValidPreloads(web_contents->GetBrowserContext());
-  if (!preloads.empty())
-    prefs->preloads = preloads;
-
   SetFontDefaults(prefs);
 
   // Custom preferences of guest page.

shell/browser/web_contents_preferences.cc

@@ -486,10 +486,6 @@ void WebContentsPreferences::OverrideWebkitPrefs(
 
   prefs->offscreen = offscreen_;
 
-  // The preload script.
-  if (preload_path_)
-    prefs->preload = *preload_path_;
-
   prefs->node_integration = node_integration_;
   prefs->node_integration_in_worker = node_integration_in_worker_;
   prefs->node_integration_in_sub_frames = node_integration_in_sub_frames_;

shell/renderer/api/electron_api_web_frame.cc

@@ -496,9 +496,7 @@ class WebFrameRenderer : public gin::Wrappable<WebFrameRenderer>,
 
     const auto& prefs = render_frame->GetBlinkPreferences();
 
-    if (pref_name == options::kPreloadScripts) {
+    if (pref_name == "isWebView") {
-      return gin::ConvertToV8(isolate, prefs.preloads);
-    } else if (pref_name == "isWebView") {
       // FIXME(zcbenz): For child windows opened with window.open('') from
       // webview, the WebPreferences is inherited from webview and the value
       // of |is_webview| is wrong.
@@ -513,8 +511,6 @@ class WebFrameRenderer : public gin::Wrappable<WebFrameRenderer>,
       return gin::ConvertToV8(isolate, prefs.hidden_page);
     } else if (pref_name == options::kOffscreen) {
       return gin::ConvertToV8(isolate, prefs.offscreen);
-    } else if (pref_name == options::kPreloadScript) {
-      return gin::ConvertToV8(isolate, prefs.preload.value());
     } else if (pref_name == options::kNodeIntegration) {
       return gin::ConvertToV8(isolate, prefs.node_integration);
     } else if (pref_name == options::kNodeIntegrationInWorker) {

spec-main/api-browser-window-spec.ts

@@ -3263,7 +3263,15 @@ describe('BrowserWindow module', () => {
         });
         w.webContents.setWindowOpenHandler(() => ({
           action: 'allow',
-          overrideBrowserWindowOptions: { show: false, webPreferences: { contextIsolation: false, webviewTag: true, nodeIntegrationInSubFrames: true } }
+          overrideBrowserWindowOptions: {
+            show: false,
+            webPreferences: {
+              contextIsolation: false,
+              webviewTag: true,
+              nodeIntegrationInSubFrames: true,
+              preload
+            }
+          }
         }));
 
         const webviewLoaded = emittedOnce(ipcMain, 'webview-loaded');

typings/internal-ambient.d.ts

@@ -107,8 +107,6 @@ declare namespace NodeJS {
     isWebView: boolean;
     hiddenPage: boolean;
     nodeIntegration: boolean;
-    preload: string
-    preloadScripts: string[];
     webviewTag: boolean;
   }