Explicit tile bounds for SkPictureShader

src/core/SkPictureShader.h

Index: src/core/SkPictureShader.h
diff --git a/src/core/SkPictureShader.h b/src/core/SkPictureShader.h
index 00aee9b0786630673572d6e97358f0ef2012a0c3..145ad2f470e5a2ef16c8063182bedd8aec2f06d7 100644
--- a/src/core/SkPictureShader.h
+++ b/src/core/SkPictureShader.h
@@ -21,7 +21,8 @@ class SkPicture;
  */
 class SkPictureShader : public SkShader {
 public:
-    static SkPictureShader* Create(const SkPicture*, TileMode, TileMode, const SkMatrix* = NULL);
+    static SkPictureShader* Create(const SkPicture*, TileMode, TileMode, const SkMatrix* = NULL,
+                                   const SkRect* = NULL);
     virtual ~SkPictureShader();
 
     virtual size_t contextSize() const SK_OVERRIDE;
@@ -38,11 +39,13 @@ protected:
     virtual Context* onCreateContext(const ContextRec&, void* storage) const SK_OVERRIDE;
 
 private:
-    SkPictureShader(const SkPicture*, TileMode, TileMode, const SkMatrix* = NULL);
+    SkPictureShader(const SkPicture*, TileMode, TileMode, const SkMatrix* = NULL,
+                    const SkRect* = NULL);
 
     SkShader* refBitmapShader(const SkMatrix&, const SkMatrix* localMatrix) const;
 
     const SkPicture*  fPicture;
+    SkRect            fTile;
     TileMode          fTmx, fTmy;
 
     mutable SkMutex                 fCachedBitmapShaderMutex;