Support tracking of IPC messages as tasks in profiler

base/profiler/scoped_profile.h

Index: base/profiler/scoped_profile.h
===================================================================
--- base/profiler/scoped_profile.h	(revision 0)
+++ base/profiler/scoped_profile.h	(revision 0)
@@ -0,0 +1,47 @@
+// Copyright (c) 2011 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.
+
+
+#ifndef BASE_PROFILER_SCOPED_PROFILE_H_
+#define BASE_PROFILER_SCOPED_PROFILE_H_
+
+//------------------------------------------------------------------------------
+// ScopedProfile provides basic helper functions for profiling a short
+// region of code within a scope.  It is separate from the related ThreadData
+// class so that it can be included without much other cruft, and provide the
+// macros listed below.
+
+#include "base/base_export.h"
+#include "base/location.h"
+#include "base/profiler/tracked_time.h"
+
+#define TRACK_RUN_IN_THIS_SCOPED_REGION_FOR_OFFICIAL_BUILDS(variable_name) \
+    ::tracked_objects::ScopedProfile variable_name(FROM_HERE)
+
+#define TRACK_RUN_IN_IPC_HANDLER(dispatch_function_name) \
+    ::tracked_objects::ScopedProfile some_tracking_variable_name(  \
+        FROM_HERE_WITH_EXPLICIT_FUNCTION(#dispatch_function_name))
+
+
+namespace tracked_objects {
+class Births;
+
+class BASE_EXPORT ScopedProfile {
+ public:
+  explicit ScopedProfile(const Location& location);
+  ~ScopedProfile();
+
+  // Stop tracing prior to the end destruction of the instance.
+  void StopClockAndTally();
+
+ private:
+  Births* birth_;  // Place in code where tracking started.
+  const TrackedTime start_of_run_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedProfile);
+};
+
+}  // namespace tracked_objects
+
+#endif   // BASE_PROFILER_SCOPED_PROFILE_H_