Revert of 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
new file mode 100644
index 0000000000000000000000000000000000000000..745d979f619014d132f3afd30088efb834717643
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/MemoryCoordinator.cpp
@@ -0,0 +1,43 @@
+// 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