Move a bunch of child-only code from content/common to content/child

content/gpu/gpu_main.cc

 // 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.
 
 #include <stdlib.h>
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include "base/debug/trace_event.h"
 #include "base/message_loop.h"
 #include "base/rand_util.h"
 #include "base/string_number_conversions.h"
 #include "base/stringprintf.h"
 #include "base/threading/platform_thread.h"
 #include "build/build_config.h"
+#include "content/child/child_process.h"
 #include "content/common/gpu/gpu_config.h"
 #include "content/common/sandbox_linux.h"
 #include "content/gpu/gpu_child_thread.h"
 #include "content/gpu/gpu_process.h"
 #include "content/gpu/gpu_watchdog_thread.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "crypto/hmac.h"
 #include "gpu/config/gpu_info_collector.h"
@@ skipping 359 matching lines @@
     return true;
   }
 
   return false;
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace.
 
 }  // namespace content