Added ImageFamily::CreateExact, which scales the best image to size.

ui/gfx/image/image_family.h

Index: ui/gfx/image/image_family.h
diff --git a/ui/gfx/image/image_family.h b/ui/gfx/image/image_family.h
index c092b2a87ca521a4ff78678581fc332b3bfed8fa..e8920b9a88f44bc8530191e4a6dbbbee0da99c27 100644
--- a/ui/gfx/image/image_family.h
+++ b/ui/gfx/image/image_family.h
@@ -136,6 +136,17 @@ class GFX_EXPORT ImageFamily {
   // NULL.
   const gfx::Image* GetBest(const gfx::Size& size) const;
 
+  // Gets an image of size |width|x|height|. If no image of that exact size
+  // exists, chooses the nearest larger image using GetBest() and scales it to
+  // the desired size. If there are no images in the family, returns an empty
+  // image.
+  gfx::Image CreateExact(int width, int height) const;
+
+  // Gets an image of size |size|. If no image of that exact size exists,
+  // chooses the nearest larger image using GetBest() and scales it to the
+  // desired size. If there are no images in the family, returns an empty image.
+  gfx::Image CreateExact(const gfx::Size& size) const;
+
  private:
   // Find the closest aspect ratio in the map to |desired_aspect|.
   // Ties are broken by the thinner aspect.