hide virtuals on device for width/height/isopaque

src/utils/SkPictureUtils.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkCanvas.h"
 #include "SkData.h"
@@ skipping 40 matching lines @@
 class GatherPixelRefDevice : public SkBaseDevice {
 public:
     SK_DECLARE_INST_COUNT(GatherPixelRefDevice)
 
     GatherPixelRefDevice(int width, int height, PixelRefSet* prset) {
         fSize.set(width, height);
         fEmptyBitmap.setInfo(SkImageInfo::MakeUnknown(width, height));
         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;
     }
     // TODO: allow this call to return failure, or move to SkBitmapDevice only.
     virtual const SkBitmap& onAccessBitmap() SK_OVERRIDE {
         return fEmptyBitmap;
     }
     virtual void lockPixels() SK_OVERRIDE { nothing_to_do(); }
     virtual void unlockPixels() SK_OVERRIDE { nothing_to_do(); }
@@ skipping 137 matching lines @@
     canvas.clipRect(area, SkRegion::kIntersect_Op, false);
     canvas.drawPicture(pict);
 
     SkData* data = NULL;
     int count = array.count();
     if (count > 0) {
         data = SkData::NewFromMalloc(array.detach(), count * sizeof(SkPixelRef*));
     }
     return data;
 }