diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/effects/gradients/SkBitmapCache.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/effects/gradients/SkBitmapCache.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+
+/*
+ * Copyright 2010 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#ifndef SkBitmapCache_DEFINED
+#define SkBitmapCache_DEFINED
+
+#include "SkBitmap.h"
+
+class SkBitmapCache : SkNoncopyable {
+public:
+    SkBitmapCache(int maxEntries);
+    ~SkBitmapCache();
+
+    bool find(const void* buffer, size_t len, SkBitmap*) const;
+    void add(const void* buffer, size_t len, const SkBitmap&);
+
+private:
+    int fEntryCount;
+    const int fMaxEntries;
+
+    struct Entry;
+    mutable Entry*  fHead;
+    mutable Entry*  fTail;
+
+    inline Entry* detach(Entry*) const;
+    inline void attachToHead(Entry*) const;
+
+#ifdef SK_DEBUG
+    void validate() const;
+#else
+    void validate() const {}
+#endif
+
+    class AutoValidate : SkNoncopyable {
+    public:
+        AutoValidate(const SkBitmapCache* bc) : fBC(bc) { bc->validate(); }
+        ~AutoValidate() { fBC->validate(); }
+    private:
+        const SkBitmapCache* fBC;
+    };
+};
+
+#endif