Change webview's zoom level on JavaScript side

atom/browser/api/atom_api_web_contents.cc

@@ -33,7 +33,6 @@
 #include "chrome/browser/printing/print_view_manager_basic.h"
 #include "chrome/browser/printing/print_preview_message_handler.h"
 #include "content/common/view_messages.h"
-#include "content/public/browser/browser_plugin_guest_manager.h"
 #include "content/public/browser/favicon_status.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/navigation_details.h"
@@ -75,15 +74,6 @@ void SetUserAgentInIO(scoped_refptr<net::URLRequestContextGetter> getter,
           user_agent));
 }
 
-bool NotifyZoomLevelChanged(
-    double level, content::WebContents* guest_web_contents) {
-  guest_web_contents->SendToAllFrames(
-      new AtomViewMsg_SetZoomLevel(MSG_ROUTING_NONE, level));
-
-  // Return false to iterate over all guests.
-  return false;
-}
-
 }  // namespace
 
 namespace mate {
@@ -625,7 +615,6 @@ bool WebContents::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(AtomViewHostMsg_Message, OnRendererMessage)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(AtomViewHostMsg_Message_Sync,
                                     OnRendererMessageSync)
-    IPC_MESSAGE_HANDLER(AtomViewHostMsg_ZoomLevelChanged, OnZoomLevelChanged)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -1154,15 +1143,6 @@ void WebContents::OnRendererMessageSync(const base::string16& channel,
   EmitWithSender(base::UTF16ToUTF8(channel), web_contents(), message, args);
 }
 
-void WebContents::OnZoomLevelChanged(double level) {
-  auto manager = web_contents()->GetBrowserContext()->GetGuestManager();
-  if (!manager)
-    return;
-  manager->ForEachGuest(web_contents(),
-                        base::Bind(&NotifyZoomLevelChanged,
-                                   level));
-}
-
 // static
 mate::Handle<WebContents> WebContents::CreateFrom(
     v8::Isolate* isolate, content::WebContents* web_contents) {

atom/browser/api/atom_api_web_contents.h

@@ -263,10 +263,6 @@ class WebContents : public mate::TrackableObject<WebContents>,
                              const base::ListValue& args,
                              IPC::Message* message);
 
-  // Called when guests need to be notified of
-  // embedders' zoom level change.
-  void OnZoomLevelChanged(double level);
-
   v8::Global<v8::Value> session_;
   v8::Global<v8::Value> devtools_web_contents_;
 

atom/browser/api/lib/web-contents.js

@@ -59,6 +59,9 @@ PDFPageSize = {
 const webFrameMethods = [
   'executeJavaScript',
   'insertText',
+  'setZoomFactor',
+  'setZoomLevel',
+  'setZoomLevelLimits',
 ];
 
 wrapWebContents = function(webContents) {