cc: Remove some unnecessary const scoped_refptr&.

cc/output/output_surface.h

 // Copyright 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 CC_OUTPUT_OUTPUT_SURFACE_H_
 #define CC_OUTPUT_OUTPUT_SURFACE_H_
 
 #include <deque>
 
 #include "base/macros.h"
@@ skipping 27 matching lines @@
 
 // Represents the output surface for a compositor. The compositor owns
 // and manages its destruction. Its lifetime is:
 //   1. Created on the main thread by the LayerTreeHost through its client.
 //   2. Passed to the compositor thread and bound to a client via BindToClient.
 //      From here on, it will only be used on the compositor thread.
 //   3. If the 3D context is lost, then the compositor will delete the output
 //      surface (on the compositor thread) and go back to step 1.
 class CC_EXPORT OutputSurface : public base::trace_event::MemoryDumpProvider {
  public:
-  OutputSurface(const scoped_refptr<ContextProvider>& context_provider,
-                const scoped_refptr<ContextProvider>& worker_context_provider,
+  OutputSurface(scoped_refptr<ContextProvider> context_provider,
+                scoped_refptr<ContextProvider> worker_context_provider,
                 scoped_ptr<SoftwareOutputDevice> software_device);
-  OutputSurface(const scoped_refptr<ContextProvider>& context_provider,
-                const scoped_refptr<ContextProvider>& worker_context_provider);
-  explicit OutputSurface(
-      const scoped_refptr<ContextProvider>& context_provider);
+  OutputSurface(scoped_refptr<ContextProvider> context_provider,
+                scoped_refptr<ContextProvider> worker_context_provider);
+  explicit OutputSurface(scoped_refptr<ContextProvider> context_provider);
 
   explicit OutputSurface(scoped_ptr<SoftwareOutputDevice> software_device);
 
-  OutputSurface(const scoped_refptr<ContextProvider>& context_provider,
+  OutputSurface(scoped_refptr<ContextProvider> context_provider,
                 scoped_ptr<SoftwareOutputDevice> software_device);
 
   ~OutputSurface() override;
 
   struct Capabilities {
     Capabilities()
         : delegated_rendering(false),
           max_frames_pending(1),
           adjust_deadline_for_parent(true),
           uses_default_gl_framebuffer(true),
@@ skipping 130 matching lines @@
 
   bool is_secure_ = false;
   base::WeakPtrFactory<OutputSurface> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_OUTPUT_SURFACE_H_