cc: Implement shared worker contexts. (v1)

components/view_manager/surfaces/surfaces_context_provider.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 "components/view_manager/surfaces/surfaces_context_provider.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/synchronization/waitable_event.h"
 #include "components/view_manager/gles2/command_buffer_driver.h"
@@ skipping 91 matching lines @@
 
 bool SurfacesContextProvider::DestroyedOnMainThread() {
   return !command_buffer_local_;
 }
 
 void SurfacesContextProvider::SetLostContextCallback(
     const LostContextCallback& lost_context_callback) {
   lost_context_callback_ = lost_context_callback;
 }
 
+bool SurfaceContextProvider::HasBeenDestroyed() {
+  return !command_buffer_local_;
+}
+
 SurfacesContextProvider::~SurfacesContextProvider() {
   implementation_->Flush();
   implementation_.reset();
   transfer_buffer_.reset();
   gles2_helper_.reset();
   command_buffer_local_.reset();
 }
 
 void SurfacesContextProvider::UpdateVSyncParameters(int64_t timebase,
                                                     int64_t interval) {
   if (delegate_)
     delegate_->OnVSyncParametersUpdated(timebase, interval);
 }
 
 void SurfacesContextProvider::DidLoseContext() {
   lost_context_callback_.Run();
 }
 
 }  // namespace surfaces