diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/images/SkImageRefPool.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/images/SkImageRefPool.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef SkImageRefPool_DEFINED
+#define SkImageRefPool_DEFINED
+
+#include "SkTypes.h"
+
+class SkImageRef;
+class SkImageRef_GlobalPool;
+
+class SkImageRefPool {
+public:
+    SkImageRefPool();
+    ~SkImageRefPool();
+
+    size_t  getRAMBudget() const { return fRAMBudget; }
+    void    setRAMBudget(size_t);
+
+    size_t  getRAMUsed() const { return fRAMUsed; }
+    void    setRAMUsed(size_t limit);
+
+    void addToHead(SkImageRef*);
+    void addToTail(SkImageRef*);
+    void detach(SkImageRef*);
+
+    void dump() const;
+
+private:
+    size_t fRAMBudget;
+    size_t fRAMUsed;
+
+    int         fCount;
+    SkImageRef* fHead, *fTail;
+
+    int computeCount() const;
+
+    friend class SkImageRef_GlobalPool;
+
+    void justAddedPixels(SkImageRef*);
+    void canLosePixels(SkImageRef*);
+    void purgeIfNeeded();
+};
+
+#endif