Remove WGC3D::isContextLost references from cc

content/browser/aura/gpu_process_transport_factory.cc

 // Copyright (c) 2013 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/aura/gpu_process_transport_factory.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 49 matching lines @@
                float device_scale_factor,
                unsigned int texture_id)
       : ui::Texture(true, size, device_scale_factor),
         host_context_(host_context),
         texture_id_(texture_id) {
     ImageTransportFactory::GetInstance()->AddObserver(this);
   }
 
   // ui::Texture overrides:
   virtual unsigned int PrepareTexture() OVERRIDE {
+    if (!host_context_ || host_context_->isContextLost())
+      return 0u;
     return texture_id_;
   }
 
   virtual WebKit::WebGraphicsContext3D* HostContext3D() OVERRIDE {
     return host_context_;
   }
 
   // ImageTransportFactory overrides:
   virtual void OnLostResources() OVERRIDE {
     DeleteTexture();
@@ skipping 466 matching lines @@
                     observer_list_,
                     OnLostResources());
 
   // Kill things that use the shared context before killing the shared context.
   lost_gl_helper.reset();
   lost_offscreen_compositor_contexts = NULL;
   lost_shared_main_thread_contexts  = NULL;
 }
 
 }  // namespace content