diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/include/gpu/GrKey.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/include/gpu/GrKey.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+/*
+ * 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 GrKey_DEFINED
+#define GrKey_DEFINED
+
+class GrKey : public SkRefCnt {
+public:
+    SK_DECLARE_INST_COUNT(GrKey)
+
+    typedef intptr_t Hash;
+
+    explicit GrKey(Hash hash) : fHash(hash) {}
+
+    intptr_t getHash() const { return fHash; }
+
+    bool operator<(const GrKey& rh) const {
+        return fHash < rh.fHash || (fHash == rh.fHash && this->lt(rh));
+    }
+    bool operator==(const GrKey& rh) const {
+        return fHash == rh.fHash && this->eq(rh);
+    }
+
+protected:
+    virtual bool lt(const GrKey& rh) const = 0;
+    virtual bool eq(const GrKey& rh) const = 0;
+
+private:
+    const Hash fHash;
+
+    typedef SkRefCnt INHERITED;
+};
+
+#endif