Reenable Purge+Suspend Memory Growth metrics.

content/renderer/render_thread_impl.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_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 572 matching lines @@
 
   void OnMemoryPressure(
       base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
 
   void OnCreateNewSharedWorker(
       const WorkerProcessMsg_CreateWorker_Params& params);
   bool RendererIsHidden() const;
   void OnRendererHidden();
   void OnRendererVisible();
 
+  enum RecordMemoryGrowthTiming {
+    RECORD_30MIN_AFTER_PURGE,
+    RECORD_60MIN_AFTER_PURGE,
+    RECORD_90MIN_AFTER_PURGE
+  };
   void RecordPurgeAndSuspendMemoryGrowthMetrics(
-      const char* suffix,
-      int foregrounded_count_when_purged);
+      int foregrounded_count_when_purged,
+      RecordMemoryGrowthTiming record_timing);
 
   void ReleaseFreeMemory();
 
   void OnSyncMemoryPressure(
       base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
 
   std::unique_ptr<cc::BeginFrameSource> CreateExternalBeginFrameSource(
       int routing_id);
 
   std::unique_ptr<cc::SyntheticBeginFrameSource>
@@ skipping 200 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_