Browser Plugin: Remove dependency on NPAPI

content/browser/frame_host/render_widget_host_view_guest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
 #include "content/browser/frame_host/render_widget_host_view_guest.h"
@@ skipping 349 matching lines @@
 void RenderWidgetHostViewGuest::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
     CopyFromCompositingSurfaceCallback& callback,
     const SkColorType color_type) {
   CHECK(guest_);
   guest_->CopyFromCompositingSurface(src_subrect, dst_size, callback);
 }
 
 void RenderWidgetHostViewGuest::SetBackgroundOpaque(bool opaque) {
-  platform_view_->SetBackgroundOpaque(opaque);
+  // Content embedders can toggle opaque backgrounds through this API.
+  // We plumb the value here so that BrowserPlugin updates its compositing
+  // state in response to this change. We also want to preserve this flag
+  // after recovering from a crash so we let BrowserPluginGuest store it.
+  if (!guest_)
+    return;
+  RenderWidgetHostViewBase::SetBackgroundOpaque(opaque);
+  host_->SetBackgroundOpaque(opaque);
+  guest_->SetContentsOpaque(opaque);
 }
 
 bool RenderWidgetHostViewGuest::LockMouse() {
   return platform_view_->LockMouse();
 }
 
 void RenderWidgetHostViewGuest::UnlockMouse() {
   return platform_view_->UnlockMouse();
 }
 
@@ skipping 213 matching lines @@
   }
 
   if (blink::WebInputEvent::isGestureEventType(event->type)) {
     host_->ForwardGestureEvent(
         *static_cast<const blink::WebGestureEvent*>(event));
     return;
   }
 }
 
 }  // namespace content