Reland: Add MemoryCoordinatorClient

third_party/WebKit/Source/core/dom/MemoryCoordinator.cpp

Index: third_party/WebKit/Source/core/dom/MemoryCoordinator.cpp
diff --git a/third_party/WebKit/Source/core/dom/MemoryCoordinator.cpp b/third_party/WebKit/Source/core/dom/MemoryCoordinator.cpp
deleted file mode 100644
index 745d979f619014d132f3afd30088efb834717643..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/dom/MemoryCoordinator.cpp
+++ /dev/null
@@ -1,43 +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.
-
-#include "core/dom/MemoryCoordinator.h"
-
-#include "core/fetch/MemoryCache.h"
-#include "platform/TraceEvent.h"
-#include "platform/fonts/FontCache.h"
-#include "platform/graphics/ImageDecodingStore.h"
-#include "platform/heap/Heap.h"
-#include "wtf/allocator/Partitions.h"
-
-namespace blink {
-
-MemoryCoordinator& MemoryCoordinator::instance()
-{
-    DEFINE_STATIC_LOCAL(MemoryCoordinator, instance, ());
-    return instance;
-}
-
-MemoryCoordinator::MemoryCoordinator()
-{
-}
-
-MemoryCoordinator::~MemoryCoordinator()
-{
-}
-
-void MemoryCoordinator::onMemoryPressure(WebMemoryPressureLevel level)
-{
-    TRACE_EVENT0("blink", "MemoryCoordinator::onMemoryPressure");
-    if (level == WebMemoryPressureLevelCritical) {
-        // Clear the image cache.
-        ImageDecodingStore::instance().clear();
-        FontCache::fontCache()->invalidate();
-    }
-    if (ProcessHeap::isLowEndDevice())
-        memoryCache()->pruneAll();
-    WTF::Partitions::decommitFreeableMemory();
-}
-
-} // namespace blink