Move tracing component to src/components

components/components_tracing.gyp

 # 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.
 
 {
   'targets' : [
     {
       'target_name': 'tracing',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],

[Nico, 2013/10/23 19:00:04]

This needs

+  'variables': {
+    'chromium_code': 1,
+  },

at the top, else files in this target are built without warnings.

Also, do you still need the defines! line?

       'dependencies': [
         '../base/base.gyp:base',
         '../ipc/ipc.gyp:ipc',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
-        'components/tracing/child_trace_message_filter.cc',
-        'components/tracing/child_trace_message_filter.h',
-        'components/tracing/tracing_messages.cc',
-        'components/tracing/tracing_messages.h',
+        'tracing/child_trace_message_filter.cc',
+        'tracing/child_trace_message_filter.h',
+        'tracing/tracing_messages.cc',
+        'tracing/tracing_messages.h',
       ],
     },
   ],
 }