Drop frontbuffers with ui-use-gpu-process, synchronized with browser, decoupled from backbuffer dro…

content/common/gpu/image_transport_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.
 
 #if defined(ENABLE_GPU)
 
 #include "content/common/gpu/image_transport_surface.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 81 matching lines @@
 
 bool ImageTransportHelper::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ImageTransportHelper, message)
     IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_BuffersSwappedACK,
                         OnBuffersSwappedACK)
     IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_PostSubBufferACK,
                         OnPostSubBufferACK)
     IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_NewACK,
                         OnNewSurfaceACK)
+    IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_ReleaseACK,
+                        OnReleaseSurfaceACK)
     IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_ResizeViewACK, OnResizeViewACK);
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void ImageTransportHelper::SendAcceleratedSurfaceRelease(
     GpuHostMsg_AcceleratedSurfaceRelease_Params params) {
   params.surface_id = stub_->surface_id();
   params.route_id = route_id_;
@@ skipping 63 matching lines @@
 void ImageTransportHelper::OnPostSubBufferACK() {
   surface_->OnPostSubBufferACK();
 }
 
 void ImageTransportHelper::OnNewSurfaceACK(
     uint64 surface_handle,
     TransportDIB::Handle shm_handle) {
   surface_->OnNewSurfaceACK(surface_handle, shm_handle);
 }
 
+void ImageTransportHelper::OnReleaseSurfaceACK(
+    uint64 surface_id, bool success) {
+  surface_->OnReleaseSurfaceACK(surface_id, success);
+}
+
 void ImageTransportHelper::OnResizeViewACK() {
   surface_->OnResizeViewACK();
 }
 
 void ImageTransportHelper::Resize(gfx::Size size) {
   // On windows, the surface is recreated and, in case the newly allocated
   // surface happens to have the same address, it should be invalidated on the
   // decoder so that future calls to MakeCurrent do not early out on the
   // assumption that neither the context or surface have actually changed.
 #if defined(OS_WIN)
@@ skipping 62 matching lines @@
 
 void PassThroughImageTransportSurface::Destroy() {
   helper_->Destroy();
   GLSurfaceAdapter::Destroy();
 }
 
 void PassThroughImageTransportSurface::OnNewSurfaceACK(
     uint64 surface_handle, TransportDIB::Handle shm_handle) {
 }
 
+void PassThroughImageTransportSurface::OnReleaseSurfaceACK(
+    uint64 surface_id, bool success) {
+}
+
 bool PassThroughImageTransportSurface::SwapBuffers() {
   bool result = gfx::GLSurfaceAdapter::SwapBuffers();
 
   if (transport_) {
     // Round trip to the browser UI thread, for throttling, by sending a dummy
     // SwapBuffers message.
     GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params params;
     params.surface_handle = 0;
 #if defined(OS_WIN)
     params.size = GetSize();
@@ skipping 55 matching lines @@
 
   if (transport_) {
     helper_->SendResizeView(size);
     helper_->SetScheduled(false);
   } else {
     Resize(new_size_);
   }
 }
 
 #endif  // defined(ENABLE_GPU)