hide virtuals on device for width/height/isopaque

src/utils/SkPictureUtils.cpp

Index: src/utils/SkPictureUtils.cpp
diff --git a/src/utils/SkPictureUtils.cpp b/src/utils/SkPictureUtils.cpp
index 46a06607748c6d321aa1eeb81ad7af3c09ebdbfa..702a78dda203baea42e9622605c75d942f2b12d3 100644
--- a/src/utils/SkPictureUtils.cpp
+++ b/src/utils/SkPictureUtils.cpp
@@ -58,9 +58,9 @@ public:
         fPRSet = prset;
     }
 
-    virtual int width() const SK_OVERRIDE { return fSize.width(); }
-    virtual int height() const SK_OVERRIDE { return fSize.height(); }
-    virtual bool isOpaque() const SK_OVERRIDE { return false; }
+    virtual SkImageInfo imageInfo() const SK_OVERRIDE {
+        return SkImageInfo::MakeUnknown(fSize.width(), fSize.height());
+    }
     virtual GrRenderTarget* accessRenderTarget() SK_OVERRIDE { return NULL; }
     virtual bool filterTextFlags(const SkPaint& paint, TextFlags*) SK_OVERRIDE {
         return false;