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

ui/gfx/gl/gl_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 "ui/gfx/gl/gl_surface.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 89 matching lines @@
 }
 
 bool GLSurface::PostSubBuffer(int x, int y, int width, int height) {
   return false;
 }
 
 bool GLSurface::OnMakeCurrent(GLContext* context) {
   return true;
 }
 
-void GLSurface::SetBufferAllocation(BufferAllocationState state) {
+void GLSurface::SetBackbufferAllocation(bool allocated) {
+}
+
+void GLSurface::SetFrontbufferAllocation(bool allocated) {
 }
 
 void* GLSurface::GetShareHandle() {
   NOTIMPLEMENTED();
   return NULL;
 }
 
 void* GLSurface::GetDisplay() {
   NOTIMPLEMENTED();
   return NULL;
@@ skipping 60 matching lines @@
 }
 
 unsigned int GLSurfaceAdapter::GetBackingFrameBufferObject() {
   return surface_->GetBackingFrameBufferObject();
 }
 
 bool GLSurfaceAdapter::OnMakeCurrent(GLContext* context) {
   return surface_->OnMakeCurrent(context);
 }
 
-void GLSurfaceAdapter::SetBufferAllocation(BufferAllocationState state) {
-  surface_->SetBufferAllocation(state);
+void GLSurfaceAdapter::SetBackbufferAllocation(bool allocated) {
+  surface_->SetBackbufferAllocation(allocated);
+}
+
+void GLSurfaceAdapter::SetFrontbufferAllocation(bool allocated) {
+  surface_->SetFrontbufferAllocation(allocated);
 }
 
 void* GLSurfaceAdapter::GetShareHandle() {
   return surface_->GetShareHandle();
 }
 
 void* GLSurfaceAdapter::GetDisplay() {
   return surface_->GetDisplay();
 }
 
 void* GLSurfaceAdapter::GetConfig() {
   return surface_->GetConfig();
 }
 
 unsigned GLSurfaceAdapter::GetFormat() {
   return surface_->GetFormat();
 }
 
 }  // namespace gfx