tracing: restructure to the components/tracing folder

components/tracing_nacl.gyp

 # 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.
 
 {
   'includes': [
     '../build/common_untrusted.gypi',
   ],
   'conditions': [
@@ skipping 15 matching lines @@
           'variables': {
             'nacl_untrusted_build': 1,
             'nlib_target': 'libtracing_nacl.a',
             'build_glibc': 0,
             'build_newlib': 0,
             'build_irt': 1,
             'build_pnacl_newlib': 0,
             'build_nonsfi_helper': 1,
           },
           'sources': [
-            'tracing/child_memory_dump_manager_delegate_impl.cc',
-            'tracing/child_memory_dump_manager_delegate_impl.h',
-            'tracing/child_trace_message_filter.cc',
-            'tracing/child_trace_message_filter.h',
-            'tracing/trace_config_file.cc',
-            'tracing/trace_config_file.h',
+            'tracing/browser/trace_config_file.cc',
+            'tracing/browser/trace_config_file.h',
+            'tracing/child/child_memory_dump_manager_delegate_impl.cc',
+            'tracing/child/child_memory_dump_manager_delegate_impl.h',
+            'tracing/child/child_trace_message_filter.cc',
+            'tracing/child/child_trace_message_filter.h',
+            'tracing/common/tracing_messages.cc',
+            'tracing/common/tracing_messages.h',
+            'tracing/common/tracing_switches.cc',
+            'tracing/common/tracing_switches.h',
             'tracing/tracing_export.h',
-            'tracing/tracing_messages.cc',
-            'tracing/tracing_messages.h',
-            'tracing/tracing_switches.cc',
-            'tracing/tracing_switches.h',
           ],
         },
       ],
     }],
   ],
 }