tracing: restructure to the components/tracing folder

ppapi/nacl_irt/ppapi_dispatcher.cc

 // Copyright 2014 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 "ppapi/nacl_irt/ppapi_dispatcher.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <set>
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "build/build_config.h"
-#include "components/tracing/child_trace_message_filter.h"
+#include "components/tracing/child/child_trace_message_filter.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_logging.h"
 #include "ipc/ipc_message.h"
 #include "ppapi/c/ppp.h"
 #include "ppapi/c/ppp_instance.h"
 #include "ppapi/nacl_irt/manifest_service.h"
 #include "ppapi/nacl_irt/plugin_startup.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_globals.h"
 #include "ppapi/proxy/plugin_message_filter.h"
@@ skipping 182 matching lines @@
     NOTREACHED();
     return;
   }
   std::map<uint32_t, proxy::PluginDispatcher*>::iterator dispatcher =
       plugin_dispatchers_.find(id);
   if (dispatcher != plugin_dispatchers_.end())
     dispatcher->second->OnMessageReceived(msg);
 }
 
 }  // namespace ppapi