Defer ChromeClient::attachRootGraphicsLayer until after compositing update.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 3717 matching lines @@
 
 void WebViewImpl::setPageOverlayColor(WebColor color) {
   if (m_pageColorOverlay)
     m_pageColorOverlay.reset();
 
   if (color == Color::transparent)
     return;
 
   m_pageColorOverlay = PageOverlay::create(
       mainFrameImpl(), WTF::makeUnique<ColorOverlay>(color));
-  m_pageColorOverlay->update();
+
+  // Run compositing update before calling updatePageOverlays.
+  mainFrameImpl()
+      ->frameView()
+      ->updateLifecycleToCompositingCleanPlusScrolling();
+
+  updatePageOverlays();
 }
 
 WebPageImportanceSignals* WebViewImpl::pageImportanceSignals() {
   return &m_pageImportanceSignals;
 }
 
 Element* WebViewImpl::focusedElement() const {
   LocalFrame* frame = m_page->focusController().focusedFrame();
   if (!frame)
     return nullptr;
@@ skipping 419 matching lines @@
   if (focusedFrame->localFrameRoot() != mainFrameImpl()->frame())
     return nullptr;
   return focusedFrame;
 }
 
 LocalFrame* WebViewImpl::focusedLocalFrameAvailableForIme() const {
   return m_imeAcceptEvents ? focusedLocalFrameInWidget() : nullptr;
 }
 
 }  // namespace blink