Introducing phased profiling framework

content/browser/profiler_controller_impl.h

Index: content/browser/profiler_controller_impl.h
diff --git a/content/browser/profiler_controller_impl.h b/content/browser/profiler_controller_impl.h
index 44e160c9a5dc2839a6554b54a8fc837539f960ac..d955e344486d479bbde59250c227e18e35e153d5 100644
--- a/content/browser/profiler_controller_impl.h
+++ b/content/browser/profiler_controller_impl.h
@@ -44,13 +44,18 @@ class ProfilerControllerImpl : public ProfilerController {
   // ProfilerController implementation:
   void Register(ProfilerSubscriber* subscriber) override;
   void Unregister(const ProfilerSubscriber* subscriber) override;
-  void GetProfilerData(int sequence_number) override;
+  void GetProfilerData(int sequence_number, int profiling_phase) override;
+  void OnProfilingPhaseCompletion(int profiling_phase) override;
 
  private:
   friend struct DefaultSingletonTraits<ProfilerControllerImpl>;
 
   // Contact child processes and get their profiler data.
-  void GetProfilerDataFromChildProcesses(int sequence_number);
+  void GetProfilerDataFromChildProcesses(int sequence_number,
+                                         int profiling_phase);
+
+  // Contact child processes and notify them of a profiling phase completion.
+  void NotifyChildProcessesOfProfilingPhaseCompletion(int profiling_phase);
 
   ProfilerSubscriber* subscriber_;