During image destroy, delete textures only if we have a GL context.

content/common/gpu/gpu_command_buffer_stub.h

 // 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.
 
 #ifndef CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #define CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 126 matching lines @@
 
   // Associates a sync point to this stub. When the stub is destroyed, it will
   // retire all sync points that haven't been previously retired.
   void AddSyncPoint(uint32 sync_point);
 
   void SetPreemptByFlag(scoped_refptr<gpu::PreemptionFlag> flag);
 
   void SetLatencyInfoCallback(const LatencyInfoCallback& callback);
 
   void MarkContextLost();
+  bool CheckContextLost();
 
   uint64 GetMemoryUsage() const;
 
  private:
   GpuMemoryManager* GetMemoryManager() const;
   bool MakeCurrent();
   void Destroy();
 
   // Cleans up and sends reply if OnInitialize failed.
   void OnInitializeFailed(IPC::Message* reply_message);
@@ skipping 62 matching lines @@
   void PutChanged();
 
   // Poll the command buffer to execute work.
   void PollWork();
 
   // Whether this command buffer needs to be polled again in the future.
   bool HasMoreWork();
 
   void ScheduleDelayedWork(int64 delay);
 
-  bool CheckContextLost();
   void CheckCompleteWaits();
 
   // The lifetime of objects of this class is managed by a GpuChannel. The
   // GpuChannels destroy all the GpuCommandBufferStubs that they own when they
   // are destroyed. So a raw pointer is safe.
   GpuChannel* channel_;
 
   // The group of contexts that share namespaces with this context.
   scoped_refptr<gpu::gles2::ContextGroup> context_group_;
 
@@ skipping 42 matching lines @@
   size_t total_gpu_memory_;
   scoped_ptr<WaitForCommandState> wait_for_token_;
   scoped_ptr<WaitForCommandState> wait_for_get_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_