Adding option in SkPicture to record device-space bounds of draw commands.

src/core/SkBBoxRecord.h

Index: src/core/SkBBoxRecord.h
===================================================================
--- src/core/SkBBoxRecord.h	(revision 9110)
+++ src/core/SkBBoxRecord.h	(working copy)
@@ -27,7 +27,11 @@
      * This is called each time we get a bounding box, it will be axis-aligned,
      * in device coordinates, and expanded to include stroking, shadows, etc.
      */
+#if SK_RECORD_BOUNDS_IN_PICTURE
+    virtual void handleBBox(uint32_t offset) = 0;
+#else
     virtual void handleBBox(const SkRect& bbox) = 0;
+#endif
 
     virtual void drawOval(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE;
     virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE;