Deliver IPC messages together with SwapCompositorFrame

content/browser/android/in_process/synchronous_compositor_output_surface.cc

Index: content/browser/android/in_process/synchronous_compositor_output_surface.cc
diff --git a/content/browser/android/in_process/synchronous_compositor_output_surface.cc b/content/browser/android/in_process/synchronous_compositor_output_surface.cc
index 4e8ff8d38a62b5cc0f392499639cc99f5406828a..6701965726aab242bc95ee80b31f7d59eae80430 100644
--- a/content/browser/android/in_process/synchronous_compositor_output_surface.cc
+++ b/content/browser/android/in_process/synchronous_compositor_output_surface.cc
@@ -14,6 +14,7 @@
 #include "content/browser/android/in_process/synchronous_compositor_impl.h"
 #include "content/browser/gpu/compositor_util.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/renderer/gpu/frame_swap_message_queue.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
 #include "third_party/skia/include/core/SkCanvas.h"
@@ -67,7 +68,8 @@ class SynchronousCompositorOutputSurface::SoftwareDevice
 };
 
 SynchronousCompositorOutputSurface::SynchronousCompositorOutputSurface(
-    int routing_id)
+    int routing_id,
+    scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue)
     : cc::OutputSurface(
           scoped_ptr<cc::SoftwareOutputDevice>(new SoftwareDevice(this))),
       routing_id_(routing_id),
@@ -75,7 +77,8 @@ SynchronousCompositorOutputSurface::SynchronousCompositorOutputSurface(
       invoking_composite_(false),
       current_sw_canvas_(NULL),
       memory_policy_(0),
-      output_surface_client_(NULL) {
+      output_surface_client_(NULL),
+      frame_swap_message_queue_(frame_swap_message_queue) {
   capabilities_.deferred_gl_initialization = true;
   capabilities_.draw_and_swap_full_viewport_every_frame = true;
   capabilities_.adjust_deadline_for_parent = false;
@@ -249,6 +252,14 @@ void SynchronousCompositorOutputSurface::SetMemoryPolicy(
     output_surface_client_->SetMemoryPolicy(memory_policy_);
 }
 
+void SynchronousCompositorOutputSurface::GetMessagesToDeliver(
+    ScopedVector<IPC::Message>* messages) {
+  DCHECK(CalledOnValidThread());
+  scoped_ptr<FrameSwapMessageQueue::SendMessageScope> send_message_scope =
+      frame_swap_message_queue_->AcquireSendMessageScope();
+  frame_swap_message_queue_->DrainMessages(messages);
+}
+
 // Not using base::NonThreadSafe as we want to enforce a more exacting threading
 // requirement: SynchronousCompositorOutputSurface() must only be used on the UI
 // thread.