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

src/core/SkPicturePlayback.h

Index: src/core/SkPicturePlayback.h
===================================================================
--- src/core/SkPicturePlayback.h	(revision 8043)
+++ src/core/SkPicturePlayback.h	(working copy)
@@ -37,6 +37,7 @@
         kCrossProcess_Flag      = 1 << 0,
         kScalarIsFloat_Flag     = 1 << 1,
         kPtrIs64Bit_Flag        = 1 << 2,
+        kHasRecordedBounds_Flag = 1 << 3,
     };
 
     uint32_t    fVersion;
@@ -72,6 +73,8 @@
 
     void dumpSize() const;
 
+    bool hasRecordedBounds() const { return fHasRecordedBounds; }
+
 #ifdef SK_BUILD_FOR_ANDROID
     // Can be called in the middle of playback (the draw() call). WIll abort the
     // drawing and return from draw() after the "current" op code is done
@@ -219,6 +222,8 @@
 
     SkTypefacePlayback fTFPlayback;
     SkFactoryPlayback* fFactoryPlayback;
+
+    bool fHasRecordedBounds;
 #ifdef SK_BUILD_FOR_ANDROID
     SkMutex fDrawMutex;
     bool fAbortCurrentPlayback;