Remove unused features for in-process GL contexts.

gpu/command_buffer/service/in_process_command_buffer.h

Index: gpu/command_buffer/service/in_process_command_buffer.h
diff --git a/gpu/command_buffer/service/in_process_command_buffer.h b/gpu/command_buffer/service/in_process_command_buffer.h
index af3956a29b312f72247ea789ff083df5d8bb98b0..f09b50590e93ba65c0df5faecf066b55978a89ae 100644
--- a/gpu/command_buffer/service/in_process_command_buffer.h
+++ b/gpu/command_buffer/service/in_process_command_buffer.h
@@ -83,7 +83,7 @@ class GPU_EXPORT InProcessCommandBuffer : public CommandBuffer,
   explicit InProcessCommandBuffer(const scoped_refptr<Service>& service);
   ~InProcessCommandBuffer() override;
 
-  // If |surface| is not NULL, use it directly; in this case, the command
+  // If |surface| is not null, use it directly; in this case, the command
   // buffer gpu thread must be the same as the client thread. Otherwise create
   // a new GLSurface.
   bool Initialize(scoped_refptr<gfx::GLSurface> surface,
@@ -92,7 +92,6 @@ class GPU_EXPORT InProcessCommandBuffer : public CommandBuffer,
                   const gfx::Size& size,
                   const std::vector<int32_t>& attribs,
                   gfx::GpuPreference gpu_preference,
-                  const base::Closure& context_lost_callback,
                   InProcessCommandBuffer* share_group,
                   GpuMemoryBufferManager* gpu_memory_buffer_manager,
                   ImageFactory* image_factory);
@@ -257,7 +256,6 @@ class GPU_EXPORT InProcessCommandBuffer : public CommandBuffer,
   scoped_refptr<gfx::GLSurface> surface_;
   scoped_refptr<SyncPointOrderData> sync_point_order_data_;
   scoped_ptr<SyncPointClient> sync_point_client_;
-  base::Closure context_lost_callback_;
   bool delayed_work_pending_;  // Used to throttle PerformDelayedWork.
   ImageFactory* image_factory_;