Add `SkIRect bounds()` convenience method to SkImageInfo and SkBitmap.

include/core/SkImageInfo.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageInfo_DEFINED
 #define SkImageInfo_DEFINED
 
 #include "SkMath.h"
+#include "SkRect.h"
 #include "SkSize.h"
 
+class SkReadBuffer;
 class SkWriteBuffer;
-class SkReadBuffer;
 
 /**
  *  Describes how to interpret the alpha compoent of a pixel.
  */
 enum SkAlphaType {
     /**
      *  All pixels should be treated as opaque, regardless of the value stored
      *  in their alpha field. Used for legacy images that wrote 0 or garbarge
      *  in their alpha field, but intended the RGB to be treated as opaque.
      */
@@ skipping 174 matching lines @@
     int height() const { return fHeight; }
     SkColorType colorType() const { return fColorType; }
     SkAlphaType alphaType() const { return fAlphaType; }
 
     bool isEmpty() const { return fWidth <= 0 || fHeight <= 0; }
 
     bool isOpaque() const {
         return SkAlphaTypeIsOpaque(fAlphaType);
     }
 
+    SkIRect bounds() const { return SkIRect::MakeWH(fWidth, fHeight); }
     SkISize dimensions() const { return SkISize::Make(fWidth, fHeight); }
 
     /**
      *  Return a new ImageInfo with the same colortype and alphatype as this info,
      *  but with the specified width and height.
      */
     SkImageInfo makeWH(int newWidth, int newHeight) const {
         return SkImageInfo::Make(newWidth, newHeight, fColorType, fAlphaType);
     }
 
@@ skipping 58 matching lines @@
 private:
     SkImageInfo(int width, int height, SkColorType ct, SkAlphaType at)
         : fWidth(width)
         , fHeight(height)
         , fColorType(ct)
         , fAlphaType(at)
     {}
 };
 
 #endif