Make RenderThreadImpl a client of memory coordinator

third_party/WebKit/Source/platform/exported/WebMemoryCoordinator.cpp

 // Copyright (c) 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.
 
 #include "public/platform/WebMemoryCoordinator.h"
 
 #include "platform/MemoryCoordinator.h"
 
 namespace blink {
 
 void WebMemoryCoordinator::onMemoryPressure(
     WebMemoryPressureLevel pressureLevel) {
   MemoryCoordinator::instance().onMemoryPressure(pressureLevel);
 }
 
+void WebMemoryCoordinator::onMemoryStateChange(MemoryState state) {
+  MemoryCoordinator::instance().onMemoryStateChange(state);
+}
+
 void WebMemoryCoordinator::prepareToSuspend() {
   MemoryCoordinator::instance().prepareToSuspend();
 }
 
 }  // namespace blink