Make cc::CompositorFrames movable [Part 1 of 2]

content/browser/devtools/render_frame_devtools_agent_host.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_BROWSER_DEVTOOLS_RENDER_FRAME_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_BROWSER_DEVTOOLS_RENDER_FRAME_DEVTOOLS_AGENT_HOST_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 48 matching lines @@
  public:
   static void AddAllAgentHosts(DevToolsAgentHost::List* result);
 
   static void OnCancelPendingNavigation(RenderFrameHost* pending,
                                         RenderFrameHost* current);
   static void OnBeforeNavigation(RenderFrameHost* current,
                                  RenderFrameHost* pending);
   static void OnBeforeNavigation(NavigationHandle* navigation_handle);
 
   void SynchronousSwapCompositorFrame(
-      const cc::CompositorFrameMetadata& frame_metadata);
+      cc::CompositorFrameMetadata frame_metadata);
 
   bool HasRenderFrameHost(RenderFrameHost* host);
 
   FrameTreeNode* frame_tree_node() { return frame_tree_node_; }
 
   // DevTooolsAgentHost overrides.
   void DisconnectWebContents() override;
   void ConnectWebContents(WebContents* web_contents) override;
   BrowserContext* GetBrowserContext() override;
   WebContents* GetWebContents() override;
@@ skipping 117 matching lines @@
 
   // The FrameTreeNode associated with this agent.
   FrameTreeNode* frame_tree_node_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameDevToolsAgentHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_RENDER_FRAME_DEVTOOLS_AGENT_HOST_H_