diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/gpu/GrRectanizer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/gpu/GrRectanizer.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,53 @@
+/*
+ * 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 GrRectanizer_DEFINED
+#define GrRectanizer_DEFINED
+
+#include "GrPoint.h"
+
+class GrRectanizerPurgeListener {
+public:
+    virtual ~GrRectanizerPurgeListener() {}
+
+    virtual void notifyPurgeStrip(void*, int yCoord) = 0;
+};
+
+class GrRectanizer {
+public:
+    GrRectanizer(int width, int height) : fWidth(width), fHeight(height) {
+        SkASSERT(width >= 0);
+        SkASSERT(height >= 0);
+    }
+
+    virtual ~GrRectanizer() {}
+
+    virtual void reset() = 0;
+
+    int width() const { return fWidth; }
+    int height() const { return fHeight; }
+
+    virtual bool addRect(int width, int height, GrIPoint16* loc) = 0;
+    virtual float percentFull() const = 0;
+
+    // return the Y-coordinate of a strip that should be purged, given height
+    // i.e. return the oldest such strip, or some other criteria. Return -1
+    // if there is no candidate
+    virtual int stripToPurge(int height) const = 0;
+    virtual void purgeStripAtY(int yCoord) = 0;
+
+    /**
+     *  Our factory, which returns the subclass du jour
+     */
+    static GrRectanizer* Factory(int width, int height);
+
+private:
+    int fWidth;
+    int fHeight;
+};
+
+#endif