chore: remove unneeded SetBackgroundOpaque hack (#35496)

shell/browser/api/electron_api_browser_window.cc

@@ -158,18 +158,6 @@ void BrowserWindow::RenderViewHostChanged(content::RenderViewHost* old_host,
     new_host->GetWidget()->AddInputEventObserver(this);
 }
 
-void BrowserWindow::RenderFrameCreated(
-    content::RenderFrameHost* render_frame_host) {
-  if (!window()->transparent())
-    return;
-
-  content::RenderWidgetHostImpl* impl = content::RenderWidgetHostImpl::FromID(
-      render_frame_host->GetProcess()->GetID(),
-      render_frame_host->GetRoutingID());
-  if (impl)
-    impl->owner_delegate()->SetBackgroundOpaque(false);
-}
-
 void BrowserWindow::DidFirstVisuallyNonEmptyPaint() {
   if (window()->IsClosed() || window()->IsVisible())
     return;
@@ -438,23 +426,6 @@ void BrowserWindow::OnDevToolsResized() {
   UpdateDraggableRegions(draggable_regions_);
 }
 
-void BrowserWindow::SetVibrancy(v8::Isolate* isolate,
-                                v8::Local<v8::Value> value) {
-  std::string type = gin::V8ToString(isolate, value);
-
-  auto* render_view_host = web_contents()->GetRenderViewHost();
-  if (render_view_host) {
-    auto* impl = content::RenderWidgetHostImpl::FromID(
-        render_view_host->GetProcess()->GetID(),
-        render_view_host->GetRoutingID());
-    if (impl)
-      impl->owner_delegate()->SetBackgroundOpaque(
-          type.empty() ? !window_->transparent() : false);
-  }
-
-  BaseWindow::SetVibrancy(isolate, value);
-}
-
 void BrowserWindow::FocusOnWebView() {
   web_contents()->GetRenderViewHost()->GetWidget()->Focus();
 }

shell/browser/api/electron_api_browser_window.h

@@ -49,7 +49,6 @@ class BrowserWindow : public BaseWindow,
   // content::WebContentsObserver:
   void RenderViewHostChanged(content::RenderViewHost* old_host,
                              content::RenderViewHost* new_host) override;
-  void RenderFrameCreated(content::RenderFrameHost* render_frame_host) override;
   void DidFirstVisuallyNonEmptyPaint() override;
   void BeforeUnloadDialogCancelled() override;
   void OnRendererUnresponsive(content::RenderProcessHost*) override;
@@ -89,7 +88,6 @@ class BrowserWindow : public BaseWindow,
   void SetTopBrowserView(gin::Handle<BrowserView> browser_view,
                          gin_helper::Arguments* args) override;
   void ResetBrowserViews() override;
-  void SetVibrancy(v8::Isolate* isolate, v8::Local<v8::Value> value) override;
   void OnWindowShow() override;
   void OnWindowHide() override;