Makes ImageSkia more like SkBitmap

ui/gfx/image/image.h

Index: ui/gfx/image/image.h
diff --git a/ui/gfx/image/image.h b/ui/gfx/image/image.h
index 9c0e6eb9671cc9e7ef58fe572953986f9116a4c0..fffe35eb903b14968479ba7cd6ab4a2c6c819f00 100644
--- a/ui/gfx/image/image.h
+++ b/ui/gfx/image/image.h
@@ -64,16 +64,16 @@ class UI_EXPORT Image {
 
   // Creates a new image with the default representation. The object will take
   // ownership of the image.
+  explicit Image(const ImageSkia& image);
+
+  // Creates a new image with the default representation. The object will take
+  // ownership of the image.
   explicit Image(const SkBitmap* bitmap);
 
   // Creates a new image by copying the bitmap for use as the default
   // representation.
   explicit Image(const SkBitmap& bitmap);
 
-  // To create an Image that supports multiple resolutions pass a vector
-  // of bitmaps, one for each resolution.
-  explicit Image(const std::vector<const SkBitmap*>& bitmaps);
-
 #if defined(TOOLKIT_GTK)
   // Does not increase |pixbuf|'s reference count; expects to take ownership.
   explicit Image(GdkPixbuf* pixbuf);
@@ -112,6 +112,7 @@ class UI_EXPORT Image {
   // backing pixels are shared amongst all copies (a fact of each of the
   // converted representations, rather than a limitation imposed by Image) and
   // so the result should be considered immutable.
+  ImageSkia* CopyImageSkia() const;
   SkBitmap* CopySkBitmap() const;
 #if defined(TOOLKIT_GTK)
   GdkPixbuf* CopyGdkPixbuf() const;