Collapse the initialize methods in WebGraphicsContext3DCommandBufferImpl

content/common/gpu/client/context_provider_command_buffer.h

Index: content/common/gpu/client/context_provider_command_buffer.h
diff --git a/content/common/gpu/client/context_provider_command_buffer.h b/content/common/gpu/client/context_provider_command_buffer.h
index 6ef512f82f2b9fb409d20e2f02561f3912ec5152..f26238069e60bb58e88703dc81ff17cab80b3410 100644
--- a/content/common/gpu/client/context_provider_command_buffer.h
+++ b/content/common/gpu/client/context_provider_command_buffer.h
@@ -82,6 +82,7 @@ class CONTENT_EXPORT ContextProviderCommandBuffer
 
   scoped_refptr<SharedProviders> shared_providers_;
 
+  base::Lock context_lock_;  // Referenced by context3d_.
   std::unique_ptr<WebGraphicsContext3DCommandBufferImpl> context3d_;
   std::unique_ptr<gpu::gles2::GLES2TraceImplementation> trace_impl_;
   std::unique_ptr<skia_bindings::GrContextForGLES2Interface> gr_context_;
@@ -92,8 +93,6 @@ class CONTENT_EXPORT ContextProviderCommandBuffer
 
   LostContextCallback lost_context_callback_;
 
-  base::Lock context_lock_;
-
   class LostContextCallbackProxy;
   std::unique_ptr<LostContextCallbackProxy> lost_context_callback_proxy_;
 };