Make rendering timeouts work even if paint data received early

content/renderer/render_widget.cc

 // Copyright (c) 2012 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 "content/renderer/render_widget.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 1376 matching lines @@
 void RenderWidget::didFirstVisuallyNonEmptyLayout() {
   QueueMessage(
       new ViewHostMsg_DidFirstVisuallyNonEmptyPaint(routing_id_),
       MESSAGE_DELIVERY_POLICY_WITH_VISUAL_STATE);
 }
 
 void RenderWidget::didFirstLayoutAfterFinishedParsing() {
   // TODO(dglazkov): Use this hook to drive CapturePageInfo.
 }
 
+void RenderWidget::didFirstPaintAfterLoad() {
+  QueueMessage(new ViewHostMsg_DidFirstPaintAfterLoad(routing_id_),
+               MESSAGE_DELIVERY_POLICY_WITH_VISUAL_STATE);
+}
+
 void RenderWidget::WillBeginCompositorFrame() {
   TRACE_EVENT0("gpu", "RenderWidget::willBeginCompositorFrame");
 
   // The UpdateTextInputState can result in further layout and possibly
   // enable GPU acceleration so they need to be called before any painting
   // is done.
   UpdateTextInputState(NO_SHOW_IME, FROM_NON_IME);
   UpdateSelectionBounds();
 }
 
@@ skipping 1003 matching lines @@
 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.AddObserver(frame);
 }
 
 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
   video_hole_frames_.RemoveObserver(frame);
 }
 #endif  // defined(VIDEO_HOLE)
 
 }  // namespace content