Issue the correct Pepper flow control calls in threaded mode

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/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 1090 matching lines @@
   TRACE_EVENT0("gpu", "RenderWidget::didDeactivateCompositor");
 
   is_accelerated_compositing_active_ = false;
   Send(new ViewHostMsg_DidActivateAcceleratedCompositing(
       routing_id_, is_accelerated_compositing_active_));
 
   if (using_asynchronous_swapbuffers_)
     using_asynchronous_swapbuffers_ = false;
 }
 
+void RenderWidget::willBeginCompositorFrame() {
+  TRACE_EVENT0("gpu", "RenderWidget::willBeginCompositorFrame");
+  WillInitiatePaint();
+}
+
 void RenderWidget::didCommitAndDrawCompositorFrame() {
   TRACE_EVENT0("gpu", "RenderWidget::didCommitAndDrawCompositorFrame");
   // Accelerated FPS tick for performance tests. See throughput_tests.cc.
   // NOTE: Tests may break if this event is renamed or moved.
   UNSHIPPED_TRACE_EVENT_INSTANT0("test_fps", "TestFrameTickGPU");
   // Notify subclasses that we initiated the paint operation.
   DidInitiatePaint();
 }
 
 void RenderWidget::didCompleteSwapBuffers() {
+  DidFlushPaint();
+
   if (update_reply_pending_)
     return;
 
   if (!next_paint_flags_ && !plugin_window_moves_.size())
     return;
 
   ViewHostMsg_UpdateRect_Params params;
   params.view_size = size_;
   params.plugin_window_moves.swap(plugin_window_moves_);
   params.flags = next_paint_flags_;
@@ skipping 538 matching lines @@
   }
 }
 
 bool RenderWidget::WillHandleMouseEvent(const WebKit::WebMouseEvent& event) {
   return false;
 }
 
 bool RenderWidget::WebWidgetHandlesCompositorScheduling() const {
   return false;
 }