Add a way for the gpu veto to report back the reason why it said no

include/core/SkPicture.h

 
 /*
  * Copyright 2007 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPicture_DEFINED
@@ skipping 278 matching lines @@
         existing optimizations (i.e., to actually have the pattern
         appear in an .skp we have to disable the optimization). Call right
         after 'beginRecording'.
     */
     void internalOnly_EnableOpts(bool enableOpts);
 
     /** Return true if the picture is suitable for rendering on the GPU.
      */
 
 #if SK_SUPPORT_GPU
-    bool suitableForGpuRasterization(GrContext*) const;
+    bool suitableForGpuRasterization(GrContext*, const char ** = NULL) const;
 #endif
 
 protected:
     // V2 : adds SkPixelRef's generation ID.
     // V3 : PictInfo tag at beginning, and EOF tag at the end
     // V4 : move SkPictInfo to be the header
     // V5 : don't read/write FunctionPtr on cross-process (we can detect that)
     // V6 : added serialization of SkPath's bounds (and packed its flags tighter)
     // V7 : changed drawBitmapRect(IRect) to drawBitmapRectToRect(Rect)
     // V8 : Add an option for encoding bitmaps
@@ skipping 210 matching lines @@
     typedef SkRefCnt INHERITED;
 };
 
 #endif
 
 #ifdef SK_SUPPORT_LEGACY_PICTURE_HEADERS
 #include "SkPictureRecorder.h"
 #endif
 
 #endif