clear() is now an alias for drawPaint, and will be deprecated as a virtual

Source/platform/graphics/InterceptingCanvas.h

Index: Source/platform/graphics/InterceptingCanvas.h
diff --git a/Source/platform/graphics/InterceptingCanvas.h b/Source/platform/graphics/InterceptingCanvas.h
index 94153d662c11cac1d076ac3b430276a58e1d5423..230a779742d58dd4028a05db1cd128503de08d62 100644
--- a/Source/platform/graphics/InterceptingCanvas.h
+++ b/Source/platform/graphics/InterceptingCanvas.h
@@ -40,7 +40,6 @@ public:
     InterceptingCanvas(SkBitmap bitmap) : SkCanvas(bitmap), m_depthCount(0) { };
     InterceptingCanvas(int width, int height) : SkCanvas(width, height), m_depthCount(0) { };
 
-    virtual void clear(SkColor) override = 0;
     virtual void drawPaint(const SkPaint&) override = 0;
     virtual void drawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override = 0;
     virtual void drawRect(const SkRect&, const SkPaint&) override = 0;