Don't draw display when its OutputSurface is lost.

content/browser/compositor/onscreen_display_client.cc

 // Copyright 2014 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/browser/compositor/onscreen_display_client.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/output/output_surface.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_manager.h"
 #include "content/browser/compositor/surface_display_output_surface.h"
 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
 #include "content/common/host_shared_bitmap_manager.h"
 
 namespace content {
 
 OnscreenDisplayClient::OnscreenDisplayClient(
     scoped_ptr<cc::OutputSurface> output_surface,
     cc::SurfaceManager* manager,
     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
     : output_surface_(output_surface.Pass()),
       display_(new cc::Display(this,
                                manager,
                                HostSharedBitmapManager::current(),
                                BrowserGpuMemoryBufferManager::current())),
       task_runner_(task_runner),
       scheduled_draw_(false),
+      output_surface_lost_(false),
       deferred_draw_(false),
       pending_frames_(0),
       weak_ptr_factory_(this) {
 }
 
 OnscreenDisplayClient::~OnscreenDisplayClient() {
 }
 
 bool OnscreenDisplayClient::Initialize() {
   return display_->Initialize(output_surface_.Pass());
@@ skipping 18 matching lines @@
 void OnscreenDisplayClient::ScheduleDraw() {
   DCHECK(!deferred_draw_);
   DCHECK(!scheduled_draw_);
   scheduled_draw_ = true;
   task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&OnscreenDisplayClient::Draw, weak_ptr_factory_.GetWeakPtr()));
 }
 
 void OnscreenDisplayClient::OutputSurfaceLost() {
+  output_surface_lost_ = true;
   surface_display_output_surface_->DidLoseOutputSurface();
 }
 
 void OnscreenDisplayClient::Draw() {
   TRACE_EVENT0("content", "OnscreenDisplayClient::Draw");
+  if (output_surface_lost_)
+    return;
   scheduled_draw_ = false;
   display_->Draw();
 }
 
 void OnscreenDisplayClient::DidSwapBuffers() {
   pending_frames_++;
 }
 
 void OnscreenDisplayClient::DidSwapBuffersComplete() {
   pending_frames_--;
   if ((pending_frames_ < display_->GetMaxFramesPending()) && deferred_draw_) {
     deferred_draw_ = false;
     ScheduleDraw();
   }
 }
 
 void OnscreenDisplayClient::SetMemoryPolicy(
     const cc::ManagedMemoryPolicy& policy) {
   surface_display_output_surface_->SetMemoryPolicy(policy);
 }
 
 }  // namespace content