gfx::Image: Added thread checker.

ui/gfx/image/image_family.cc

Index: ui/gfx/image/image_family.cc
diff --git a/ui/gfx/image/image_family.cc b/ui/gfx/image/image_family.cc
index b9d28bddd9df387e8b7fbc99544379de6b95e79a..52ea315f5587cf92c56ed7282513822e7b19f741 100644
--- a/ui/gfx/image/image_family.cc
+++ b/ui/gfx/image/image_family.cc
@@ -136,6 +136,16 @@ gfx::Image ImageFamily::CreateExact(const gfx::Size& size) const {
   return CreateExact(size.width(), size.height());
 }
 
+void ImageFamily::DisableThreadChecking() {
+  for (auto& item : map_)
+    item.second.DisableThreadChecking();
+}
+
+void ImageFamily::DetachFromThread() {
+  for (auto& item : map_)
+    item.second.DetachFromThread();
+}
+
 const gfx::Image* ImageFamily::GetWithExactAspect(float aspect,
                                                   int width) const {
   // Find the two images of given aspect ratio on either side of |width|.