move skpdiff into tools

experimental/skpdiff/SkDifferentPixelsMetric.h

Index: experimental/skpdiff/SkDifferentPixelsMetric.h
diff --git a/experimental/skpdiff/SkDifferentPixelsMetric.h b/experimental/skpdiff/SkDifferentPixelsMetric.h
deleted file mode 100644
index 38fa5ac55c826e59a02b67a82d2d199791b914e1..0000000000000000000000000000000000000000
--- a/experimental/skpdiff/SkDifferentPixelsMetric.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkDifferentPixelsMetric_DEFINED
-#define SkDifferentPixelsMetric_DEFINED
-
-#include "SkTDArray.h"
-
-#if SK_SUPPORT_OPENCL
-#include "SkCLImageDiffer.h"
-#else
-#include "SkImageDiffer.h"
-#endif
-
-/**
- * A differ that measures the percentage of different corresponding pixels. If the two images are
- * not the same size or have no pixels, the result will always be zero.
- */
-class SkDifferentPixelsMetric :
-#if SK_SUPPORT_OPENCL
-    public SkCLImageDiffer {
-#else
-    public SkImageDiffer {
-#endif
-public:
-    virtual const char* getName() SK_OVERRIDE;
-    virtual int queueDiff(SkBitmap* baseline, SkBitmap* test) SK_OVERRIDE;
-    virtual void deleteDiff(int id) SK_OVERRIDE;
-    virtual bool isFinished(int id) SK_OVERRIDE;
-    virtual double getResult(int id) SK_OVERRIDE;
-    virtual int getPointsOfInterestCount(int id) SK_OVERRIDE;
-    virtual SkIPoint* getPointsOfInterest(int id) SK_OVERRIDE;
-
-protected:
-#if SK_SUPPORT_OPENCL
-    virtual bool onInit() SK_OVERRIDE;
-#endif
-
-private:
-    struct QueuedDiff;
-
-    SkTDArray<QueuedDiff> fQueuedDiffs;
-
-#if SK_SUPPORT_OPENCL
-    cl_kernel fKernel;
-
-    typedef SkCLImageDiffer INHERITED;
-#else
-    typedef SkImageDiffer INHERITED;
-#endif
-};
-
-#endif