[Mac] Delay TabContents::Close() when event-tracking.

chrome/browser/cocoa/tab_controller.mm

Index: chrome/browser/cocoa/tab_controller.mm
diff --git a/chrome/browser/cocoa/tab_controller.mm b/chrome/browser/cocoa/tab_controller.mm
index 0d05c5c0f0197ceb923de54878084d35c6616cb5..94de7cfc1a72ee6f571fe8d58bdd72cd9d2ad280 100644
--- a/chrome/browser/cocoa/tab_controller.mm
+++ b/chrome/browser/cocoa/tab_controller.mm
@@ -47,17 +47,6 @@
 }
 
 - (void)dealloc {
-  // Since the tab can be closed from JavaScript it is possible for
-  // |contextMenu_| to remain visible after the tab has closed, or for
-  // |closeButton_| to be tracking the mouse.  Make sure neither sends
-  // us an action after -dealloc.
-  [closeButton_ setTarget:nil];
-  [contextMenu_ setAutoenablesItems:NO];
-  for (NSMenuItem* item in [contextMenu_ itemArray]) {
-    [item setTarget:nil];
-    [item setEnabled:NO];
-  }
-
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [super dealloc];
 }