Deliver IPC messages together with SwapCompositorFrame

content/renderer/gpu/compositor_output_surface.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/gpu/compositor_output_surface.h"
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/managed_memory_policy.h"
 #include "cc/output/output_surface_client.h"
 #include "content/common/gpu/client/command_buffer_proxy_impl.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 #include "content/common/view_messages.h"
 #include "content/public/common/content_switches.h"
+#include "content/renderer/gpu/frame_swap_message_queue.h"
 #include "content/renderer/render_thread_impl.h"
 #include "gpu/command_buffer/client/context_support.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "ipc/ipc_forwarding_message_filter.h"
 #include "ipc/ipc_sync_channel.h"
 
 namespace {
 // There are several compositor surfaces in a process, but they share the same
 // compositor thread, so we use a simple int here to track prefer-smoothness.
 int g_prefer_smoothness_count = 0;
@@ skipping 19 matching lines @@
   return new IPC::ForwardingMessageFilter(
       messages_to_filter, arraysize(messages_to_filter),
       target_task_runner);
 }
 
 CompositorOutputSurface::CompositorOutputSurface(
     int32 routing_id,
     uint32 output_surface_id,
     const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
     scoped_ptr<cc::SoftwareOutputDevice> software_device,
+    scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue,
     bool use_swap_compositor_frame_message)
     : OutputSurface(context_provider, software_device.Pass()),
       output_surface_id_(output_surface_id),
       use_swap_compositor_frame_message_(use_swap_compositor_frame_message),
       output_surface_filter_(
           RenderThreadImpl::current()->compositor_output_surface_filter()),
+      frame_swap_message_queue_(swap_frame_message_queue),
       routing_id_(routing_id),
       prefers_smoothness_(false),
 #if defined(OS_WIN)
       // TODO(epenner): Implement PlatformThread::CurrentHandle() on windows.
       main_thread_handle_(base::PlatformThreadHandle()),
 #else
       main_thread_handle_(base::PlatformThread::CurrentHandle()),
 #endif
       layout_test_mode_(RenderThreadImpl::current()->layout_test_mode()),
       weak_ptrs_(this) {
   DCHECK(output_surface_filter_.get());
+  DCHECK(frame_swap_message_queue_.get());
   DetachFromThread();
   message_sender_ = RenderThreadImpl::current()->sync_message_filter();
   DCHECK(message_sender_.get());
   if (OutputSurface::software_device())
     capabilities_.max_frames_pending = 1;
 }
 
 CompositorOutputSurface::~CompositorOutputSurface() {
   DCHECK(CalledOnValidThread());
   SetNeedsBeginFrame(false);
@@ skipping 71 matching lines @@
       uint32 sync_point = context->InsertSyncPointCHROMIUM();
       context_provider_->ContextSupport()->SignalSyncPoint(sync_point, closure);
     } else {
       base::MessageLoopProxy::current()->PostTask(FROM_HERE, closure);
     }
     client_->DidSwapBuffers();
     return;
   }
 
   if (use_swap_compositor_frame_message_) {
-    Send(new ViewHostMsg_SwapCompositorFrame(routing_id_,
-                                             output_surface_id_,
-                                             *frame));
+    {
+      std::vector<IPC::Message> messages_to_deliver_with_frame;
+      scoped_ptr<FrameSwapMessageQueue::SendMessageScope> send_message_scope =
+          frame_swap_message_queue_->AcquireSendMessageScope();
+      frame_swap_message_queue_->DrainMessages(&messages_to_deliver_with_frame);
+      Send(new ViewHostMsg_SwapCompositorFrame(routing_id_,
+                                               output_surface_id_,
+                                               *frame,
+                                               messages_to_deliver_with_frame));
+      // ~send_message_scope.
+    }
     client_->DidSwapBuffers();
     return;
   }
 
   if (frame->gl_frame_data) {
     context_provider_->ContextGL()->ShallowFlushCHROMIUM();
     ContextProviderCommandBuffer* provider_command_buffer =
         static_cast<ContextProviderCommandBuffer*>(context_provider_.get());
     CommandBufferProxyImpl* command_buffer_proxy =
         provider_command_buffer->GetCommandBufferProxy();
@@ skipping 97 matching lines @@
   // If this is the last surface to stop preferring smoothness,
   // Reset the main thread's priority to the default.
   if (prefers_smoothness_ == true &&
       --g_prefer_smoothness_count == 0) {
     SetThreadPriorityToDefault(main_thread_handle_);
   }
   prefers_smoothness_ = prefers_smoothness;
 }
 
 }  // namespace content