Make RenderThreadImpl a client of memory coordinator

third_party/WebKit/public/platform/WebMemoryCoordinator.h

 // Copyright 2015 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 WebMemoryCoordinator_h
 #define WebMemoryCoordinator_h
 
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebMemoryPressureLevel.h"
+#include "public/platform/WebMemoryState.h"
 
 namespace blink {
 
 class WebMemoryCoordinator {
  public:
   // Called when a memory pressure notification is received.
   // TODO(bashi): Deprecating. Remove this when MemoryPressureListener is
   // gone.
   BLINK_PLATFORM_EXPORT static void onMemoryPressure(WebMemoryPressureLevel);
 
+  BLINK_PLATFORM_EXPORT static void onMemoryStateChange(MemoryState);
+
   // Called when Blink is going to be suspended.
   BLINK_PLATFORM_EXPORT static void prepareToSuspend();
 };
 
 }  // namespace blink
 
 #endif