[DevTools] Migrate DevToolsTracingHandler to generated handler.

content/content_browser.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
     '../net/net.gyp:net',
@@ skipping 427 matching lines @@
       'browser/devtools/devtools_http_handler_impl.cc',
       'browser/devtools/devtools_http_handler_impl.h',
       'browser/devtools/devtools_manager.cc',
       'browser/devtools/devtools_manager.h',
       'browser/devtools/devtools_netlog_observer.cc',
       'browser/devtools/devtools_netlog_observer.h',
       'browser/devtools/devtools_protocol.cc',
       'browser/devtools/devtools_protocol.h',
       'browser/devtools/devtools_system_info_handler.cc',
       'browser/devtools/devtools_system_info_handler.h',
-      'browser/devtools/devtools_tracing_handler.h',
-      'browser/devtools/devtools_tracing_handler.cc',
       'browser/devtools/forwarding_agent_host.cc',
       'browser/devtools/forwarding_agent_host.h',
       'browser/devtools/ipc_devtools_agent_host.cc',
       'browser/devtools/ipc_devtools_agent_host.h',
       'browser/devtools/embedded_worker_devtools_agent_host.cc',
       'browser/devtools/embedded_worker_devtools_agent_host.h',
       'browser/devtools/embedded_worker_devtools_manager.cc',
       'browser/devtools/embedded_worker_devtools_manager.h',
       'browser/devtools/protocol/color_picker.cc',
       'browser/devtools/protocol/color_picker.h',
@@ skipping 1458 matching lines @@
       'sources': [
         'browser/media/cdm/browser_cdm_manager.cc',
         'browser/media/cdm/browser_cdm_manager.h',
         # This works on Android because enable_browser_cdms==1 on Android.
         'browser/media/media_web_contents_observer.cc',
         'browser/media/media_web_contents_observer.h',
       ],
     }],
   ],
 }