Revert of Add MemoryCoordinatorClient

third_party/WebKit/Source/platform/MemoryCoordinator.h

Index: third_party/WebKit/Source/platform/MemoryCoordinator.h
diff --git a/third_party/WebKit/Source/platform/MemoryCoordinator.h b/third_party/WebKit/Source/platform/MemoryCoordinator.h
deleted file mode 100644
index 876764f9ce5c070ccd4eaa53c13d89421e984b73..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/platform/MemoryCoordinator.h
+++ /dev/null
@@ -1,56 +0,0 @@
-// 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 MemoryCoordinator_h
-#define MemoryCoordinator_h
-
-#include "platform/PlatformExport.h"
-#include "platform/heap/Handle.h"
-#include "public/platform/WebMemoryPressureLevel.h"
-#include "wtf/Noncopyable.h"
-
-namespace blink {
-
-class PLATFORM_EXPORT MemoryCoordinatorClient : public GarbageCollectedMixin {
-public:
-    virtual ~MemoryCoordinatorClient() { }
-
-    // Called when MemoryCoordinator is asked to purge memory.
-    virtual void purgeMemory() { }
-
-    // TODO(bashi): Deprecating. Remove this when MemoryPressureListener is
-    // gone.
-    virtual void onMemoryPressure(WebMemoryPressureLevel) { }
-
-    DECLARE_VIRTUAL_TRACE();
-};
-
-// MemoryCoordinator listens to some events which could be opportunities
-// for reducing memory consumption and notifies its clients.
-class PLATFORM_EXPORT MemoryCoordinator final {
-    WTF_MAKE_NONCOPYABLE(MemoryCoordinator);
-public:
-    static MemoryCoordinator& instance();
-
-    void registerClient(MemoryCoordinatorClient*);
-    void unregisterClient(MemoryCoordinatorClient*);
-
-    void purgeMemory();
-
-    // TODO(bashi): Deprecating. Remove this when MemoryPressureListener is
-    // gone.
-    void onMemoryPressure(WebMemoryPressureLevel);
-
-    DECLARE_TRACE();
-
-private:
-    MemoryCoordinator();
-    ~MemoryCoordinator();
-
-    HeapHashSet<WeakMember<MemoryCoordinatorClient>> m_clients;
-};
-
-} // namespace blink
-
-#endif // MemoryCoordinator_h