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..731c4868f54db8cffe571b1cd3c96f30a43a4037 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,