Deliver IPC messages together with SwapCompositorFrame

content/renderer/render_widget.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "cc/debug/rendering_stats_instrumentation.h"
 #include "content/common/content_export.h"
 #include "content/common/cursors/webcursor.h"
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
@@ skipping 37 matching lines @@
 }
 
 namespace cc { class OutputSurface; }
 
 namespace gfx {
 class Range;
 }
 
 namespace content {
 class ExternalPopupMenu;
+class FrameSwapMessageQueue;
 class PepperPluginInstanceImpl;
 class RenderFrameImpl;
 class RenderWidgetCompositor;
 class RenderWidgetTest;
 class ResizingModeSelector;
 struct ContextMenuParams;
 struct WebPluginGeometry;
 
 // RenderWidget provides a communication bridge between a WebWidget and
 // a RenderWidgetHost, the latter of which lives in a different process.
@@ skipping 90 matching lines @@
   void QueueSyntheticGesture(
       scoped_ptr<SyntheticGestureParams> gesture_params,
       const SyntheticGestureCompletionCallback& callback);
 
   // Close the underlying WebWidget.
   virtual void Close();
 
   // Notifies about a compositor frame commit operation having finished.
   virtual void DidCommitCompositorFrame();
 
+  // If the RenderWidget doesn't need a commit this is equivalent to Send,
+  // otherwise this will make sure |msg| is delivered with a frame swap
+  // coresponding to the commit that is about to occur.
+  //
+  // |msg| message to send, ownership of |msg| is transferred.
+  void QueueMessage(IPC::Message* msg);
+
   // Handle common setup/teardown for handling IME events.
   void StartHandlingImeEvent();
   void FinishHandlingImeEvent();
 
   // Returns whether we currently should handle an IME event.
   bool ShouldHandleImeEvent();
 
   virtual void InstrumentWillBeginFrame(int frame_id) {}
   virtual void InstrumentDidBeginFrame() {}
   virtual void InstrumentDidCancelFrame() {}
@@ skipping 491 matching lines @@
 #endif  // defined(OS_MACOSX)
 
   scoped_ptr<ScreenMetricsEmulator> screen_metrics_emulator_;
 
   // Popups may be displaced when screen metrics emulation is enabled.
   // These values are used to properly adjust popup position.
   gfx::Point popup_view_origin_for_emulation_;
   gfx::Point popup_screen_origin_for_emulation_;
   float popup_origin_scale_for_emulation_;
 
+  scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue_;
   scoped_ptr<ResizingModeSelector> resizing_mode_selector_;
 
   // A list of swapped out RenderFrames that need to be notified
   // of compositing-related events (e.g. DidCommitCompositorFrame).
   ObserverList<RenderFrameImpl> swapped_out_frames_;
 
   ui::MenuSourceType context_menu_source_type_;
   gfx::Point touch_editing_context_menu_location_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_