gfx::Image: Added thread checker.

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 e8920b9a88f44bc8530191e4a6dbbbee0da99c27..8fc5f2153c0cedb9ca630eb21d29e4e81ec45abf 100644
--- a/ui/gfx/image/image_family.h
+++ b/ui/gfx/image/image_family.h
@@ -147,6 +147,12 @@ class GFX_EXPORT ImageFamily {
   // desired size. If there are no images in the family, returns an empty image.
   gfx::Image CreateExact(const gfx::Size& size) const;
 
+  // Calls DisableThreadChecking() on all images.
+  void DisableThreadChecking();
+
+  // Calls DetachFromThread() on all images.
+  void DetachFromThread();
+
  private:
   // Find the closest aspect ratio in the map to |desired_aspect|.
   // Ties are broken by the thinner aspect.