chore: remove unused use_transparent_window.patch (#15534)

Unneeded since 6f2f761df3 (diff-0bbbec38254ebb1146b15c15277c6aa1)

atom/browser/api/atom_api_browser_window.cc

@@ -74,10 +74,6 @@ BrowserWindow::BrowserWindow(v8::Isolate* isolate,
   mate::Dictionary(isolate, web_contents->GetWrapper())
       .Set("browserWindowOptions", options);
 
-  // Tell the content module to initialize renderer widget with transparent
-  // mode.
-  ui::GpuSwitchingManager::SetTransparent(window()->transparent());
-
   // Associate with BrowserWindow.
   web_contents->SetOwnerWindow(window());
 

atom/browser/native_window_mac.mm

@@ -1229,14 +1229,12 @@ void NativeWindowMac::SetVibrancy(const std::string& type) {
 
       [vibrant_view removeFromSuperview];
       [window_ setVibrantView:nil];
-      ui::GpuSwitchingManager::SetTransparent(transparent());
 
       return;
     }
 
     background_color_before_vibrancy_.reset([[window_ backgroundColor] retain]);
     transparency_before_vibrancy_ = [window_ titlebarAppearsTransparent];
-    ui::GpuSwitchingManager::SetTransparent(true);
 
     if (title_bar_style_ != NORMAL) {
       [window_ setTitlebarAppearsTransparent:YES];

patches/common/chromium/.patches

@@ -21,7 +21,6 @@ render_widget_host_view_mac.patch
 scoped_clipboard_writer.patch
 stream_resource_handler.patch
 thread_capabilities.patch
-use_transparent_window.patch
 web_contents.patch
 webgl_context_attributes.patch
 webview_cross_drag.patch

patches/common/chromium/use_transparent_window.patch

@@ -1,54 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Cheng Zhao <zcbenz@gmail.com>
-Date: Thu, 20 Sep 2018 17:46:50 -0700
-Subject: use_transparent_window.patch
-
-
-diff --git a/ui/gl/gpu_switching_manager.cc b/ui/gl/gpu_switching_manager.cc
-index be715646580966ddadb762940efd8c627e7a1e65..4529866b08645691e3aa901c57890b11ce2bd829 100644
---- a/ui/gl/gpu_switching_manager.cc
-+++ b/ui/gl/gpu_switching_manager.cc
-@@ -4,6 +4,12 @@
- 
- #include "ui/gl/gpu_switching_manager.h"
- 
-+namespace {
-+
-+bool g_use_transparent = false;
-+
-+}  // namespace
-+
- namespace ui {
- 
- // static
-@@ -11,6 +17,16 @@ GpuSwitchingManager* GpuSwitchingManager::GetInstance() {
-   return base::Singleton<GpuSwitchingManager>::get();
- }
- 
-+// static
-+void GpuSwitchingManager::SetTransparent(bool transparent) {
-+  g_use_transparent = transparent;
-+}
-+
-+// static
-+bool GpuSwitchingManager::UseTransparent() {
-+  return g_use_transparent;
-+}
-+
- GpuSwitchingManager::GpuSwitchingManager() {}
- 
- GpuSwitchingManager::~GpuSwitchingManager() {}
-diff --git a/ui/gl/gpu_switching_manager.h b/ui/gl/gpu_switching_manager.h
-index 4308bbed939898323f26a747330937b7009f11b4..a7cafcfccdffd1b63858d2fc7650eba7d6ec418e 100644
---- a/ui/gl/gpu_switching_manager.h
-+++ b/ui/gl/gpu_switching_manager.h
-@@ -18,6 +18,9 @@ class GL_EXPORT GpuSwitchingManager {
-   // Getter for the singleton. This will return NULL on failure.
-   static GpuSwitchingManager* GetInstance();
- 
-+  static void SetTransparent(bool transparent);
-+  static bool UseTransparent();
-+
-   void AddObserver(GpuSwitchingObserver* observer);
-   void RemoveObserver(GpuSwitchingObserver* observer);
-