Switch Blink to using new Skia SkCanvas::drawPicture method

Source/platform/graphics/GraphicsContextRecorder.cpp

Index: Source/platform/graphics/GraphicsContextRecorder.cpp
diff --git a/Source/platform/graphics/GraphicsContextRecorder.cpp b/Source/platform/graphics/GraphicsContextRecorder.cpp
index 02615de435184b81902e47fee8b0ae3087c9a66d..e22ae878e73537d03ebf5f540ce259ffa3311c52 100644
--- a/Source/platform/graphics/GraphicsContextRecorder.cpp
+++ b/Source/platform/graphics/GraphicsContextRecorder.cpp
@@ -202,11 +202,6 @@ public:
         params->setObject("paint", objectForSkPaint(paint));
     }
 
-    void drawPicture(SkPicture& picture) OVERRIDE
-    {
-        addItemWithParams("drawPicture")->setObject("picture", objectForSkPicture(picture));
-    }
-
     void drawRect(const SkRect& rect, const SkPaint& paint) OVERRIDE
     {
         RefPtr<JSONObject> params = addItemWithParams("drawRect");
@@ -397,6 +392,11 @@ public:
         params->setString("op", regionOpName(op));
     }
 
+    void onDrawPicture(const SkPicture* picture) OVERRIDE
+    {
+        addItemWithParams("drawPicture")->setObject("picture", objectForSkPicture(*picture));
+    }
+
     void didSetMatrix(const SkMatrix& matrix) OVERRIDE
     {
         RefPtr<JSONObject> params = addItemWithParams("setMatrix");