mac: Stop using __weak.

chrome/browser/ui/cocoa/tabs/media_indicator_button_cocoa.h

Index: chrome/browser/ui/cocoa/tabs/media_indicator_button_cocoa.h
diff --git a/chrome/browser/ui/cocoa/tabs/media_indicator_button_cocoa.h b/chrome/browser/ui/cocoa/tabs/media_indicator_button_cocoa.h
index 8216bc8430b01b38c48c03ed70032225408d6d23..d8bfec8ba69c7871f41911cc228a4da466036e17 100644
--- a/chrome/browser/ui/cocoa/tabs/media_indicator_button_cocoa.h
+++ b/chrome/browser/ui/cocoa/tabs/media_indicator_button_cocoa.h
@@ -43,14 +43,14 @@ class AnimationDelegate;
   // Target and action invoked whenever a fade-in/out animation completes.  This
   // is used by TabController to layout the TabView after an indicator has
   // completely faded out.
-  __weak id animationDoneTarget_;
+  id animationDoneTarget_;  // weak
   SEL animationDoneAction_;
 
   // The image to show when the mouse hovers over the button.
   base::scoped_nsobject<NSImage> affordanceImage_;
 
   // Target and action invoked whenever an enabled button is clicked.
-  __weak id clickTarget_;
+  id clickTarget_;  // weak
   SEL clickAction_;
 }