[UMA] Use proper C++ objects to serialize tracked_objects across process boundaries.

content/public/browser/profiler_controller.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_PROFILER_CONTROLLER_H_
 #define CONTENT_PUBLIC_BROWSER_PROFILER_CONTROLLER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 21 matching lines @@
   virtual ~ProfilerController() {}
 
   // Register the subscriber so that it will be called when for example
   // OnProfilerDataCollected is returning profiler data from a child process.
   // This is called on UI thread.
   virtual void Register(ProfilerSubscriber* subscriber) = 0;
 
   // Unregister the subscriber so that it will not be called when for example
   // OnProfilerDataCollected is returning profiler data from a child process.
   // Safe to call even if caller is not the current subscriber.
-  virtual void Unregister(ProfilerSubscriber* subscriber) = 0;
+  virtual void Unregister(const ProfilerSubscriber* subscriber) = 0;
 
   // Contact all processes and get their profiler data.
   virtual void GetProfilerData(int sequence_number) = 0;
-
-  // Contact all processes and set profiler status to |enable|.
-  virtual void SetProfilerStatus(
-      tracked_objects::ThreadData::Status status) = 0;
-
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PROFILER_CONTROLLER_H_
-