Implement fullscreen info bubble on Win and Mac

chrome/browser/ui/cocoa/info_bubble_window.h

Index: chrome/browser/ui/cocoa/info_bubble_window.h
diff --git a/chrome/browser/ui/cocoa/info_bubble_window.h b/chrome/browser/ui/cocoa/info_bubble_window.h
index cf992d71c03263acf9e3b0336939263b2740f9e9..b29b14da8c857d796aeab7afefca11cedbc21250 100644
--- a/chrome/browser/ui/cocoa/info_bubble_window.h
+++ b/chrome/browser/ui/cocoa/info_bubble_window.h
@@ -18,11 +18,15 @@ class AppNotificationBridge;
   // If NO the window will close immediately instead of fading out.
   // Default YES.
   BOOL delayOnClose_;
+  // If NO the window will never become key.
+  // Default YES.
+  BOOL canBecomeKey_;
   // Bridge to proxy Chrome notifications to the window.
   scoped_ptr<AppNotificationBridge> notificationBridge_;
 }
 
 @property(nonatomic) BOOL delayOnClose;
+@property(nonatomic) BOOL canBecomeKey;
 
 // Returns YES if the window is in the process of closing.
 // Can't use "windowWillClose" notification because that will be sent