Automatically redraw the display on resume.

services/gles2/command_buffer_impl.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 "services/gles2/command_buffer_impl.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "gpu/command_buffer/service/sync_point_manager.h"
 #include "services/gles2/command_buffer_driver.h"
@@ skipping 39 matching lines @@
     mojo::InterfaceRequest<mojo::CommandBuffer> request,
     mojo::ViewportParameterListenerPtr listener,
     scoped_refptr<base::SingleThreadTaskRunner> control_task_runner,
     gpu::SyncPointManager* sync_point_manager,
     scoped_ptr<CommandBufferDriver> driver)
     : sync_point_manager_(sync_point_manager),
       driver_task_runner_(base::MessageLoop::current()->task_runner()),
       driver_(driver.Pass()),
       viewport_parameter_listener_(listener.Pass()),
       binding_(this),
+      observer_(nullptr),
       weak_factory_(this) {
   driver_->set_client(make_scoped_ptr(new CommandBufferDriverClientImpl(
       weak_factory_.GetWeakPtr(), control_task_runner)));
 
   control_task_runner->PostTask(
       FROM_HERE, base::Bind(&CommandBufferImpl::BindToRequest,
                             base::Unretained(this), base::Passed(&request)));
 }
 
 CommandBufferImpl::~CommandBufferImpl() {
+  if (observer_) {
+    observer_->OnCommandBufferImplDestroyed();
+  }
   driver_task_runner_->PostTask(
       FROM_HERE, base::Bind(&DestroyDriver, base::Passed(&driver_)));
 }
 
 void CommandBufferImpl::Initialize(
     mojo::CommandBufferSyncClientPtr sync_client,
     mojo::CommandBufferSyncPointClientPtr sync_point_client,
     mojo::CommandBufferLostContextObserverPtr loss_observer,
     mojo::ScopedSharedBufferHandle shared_state) {
   sync_point_client_ = sync_point_client.Pass();
@@ skipping 71 matching lines @@
 
 void CommandBufferImpl::UpdateVSyncParameters(base::TimeTicks timebase,
                                               base::TimeDelta interval) {
   if (!viewport_parameter_listener_)
     return;
   viewport_parameter_listener_->OnVSyncParametersUpdated(
       timebase.ToInternalValue(), interval.ToInternalValue());
 }
 
 }  // namespace gles2