CommandLine: add a CopySwitchesFrom() for copying from another CommandLine

chrome/browser/gpu_process_host.h

 // Copyright (c) 2010 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 CHROME_BROWSER_GPU_PROCESS_HOST_H_
 #define CHROME_BROWSER_GPU_PROCESS_HOST_H_
 #pragma once
 
 #include <queue>
 
@@ skipping 74 matching lines @@
   void OnChannelEstablished(const IPC::ChannelHandle& channel_handle,
                             const GPUInfo& gpu_info);
   void OnSynchronizeReply();
 #if defined(OS_LINUX)
   void OnGetViewXID(gfx::NativeViewId id, unsigned long* xid);
 #endif
 
   void ReplyToRenderer(const IPC::ChannelHandle& channel,
                        ResourceMessageFilter* filter);
 
-  // Copies applicable command line switches from the given |browser_cmd| line
-  // flags to the output |gpu_cmd| line flags. Not all switches will be
-  // copied over.
-  void PropagateBrowserCommandLineToGpu(const CommandLine& browser_cmd,
-                                        CommandLine* gpu_cmd) const;
-
   // ResourceDispatcherHost::Receiver implementation:
   virtual URLRequestContext* GetRequestContext(
       uint32 request_id,
       const ViewHostMsg_Resource_Request& request_data);
 
   virtual bool CanShutdown();
 
   bool initialized_;
   bool initialized_successfully_;
 
   // GPUInfo class used for collecting gpu stats
   GPUInfo gpu_info_;
 
   // These are the channel requests that we have already sent to
   // the GPU process, but haven't heard back about yet.
   std::queue<ChannelRequest> sent_requests_;
 
   // The pending synchronization requests we need to reply to.
   std::queue<SynchronizationRequest> queued_synchronization_replies_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
 };
 
 #endif  // CHROME_BROWSER_GPU_PROCESS_HOST_H_