Adding tools menu responsiveness metric.

ios/chrome/browser/ui/toolbar/toolbar_controller.mm

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/ui/toolbar/toolbar_controller.h"
 
 #include <QuartzCore/QuartzCore.h>
 
 #include "base/format_macros.h"
 #include "base/i18n/rtl.h"
@@ skipping 42 matching lines @@
 
 // The initial capacity used to construct |self.transitionLayers|.  The value
 // is chosen because WebToolbarController animates 11 separate layers during
 // transitions; this value should be updated if new subviews are animated in
 // the future.
 const NSUInteger kTransitionLayerCapacity = 11;
 
 // Externed delay before non-initial button images are loaded.
 const int64_t kNonInitialImageAdditionDelayNanosec = 500000LL;
 NSString* const kMenuWillShowNotification = @"kMenuWillShowNotification";
+NSString* const kMenuDidShowNotification = @"kMenuDidShowNotification";
 NSString* const kMenuWillHideNotification = @"kMenuWillHideNotification";
 
 NSString* const kToolbarIdentifier = @"kToolbarIdentifier";
 NSString* const kIncognitoToolbarIdentifier = @"kIncognitoToolbarIdentifier";
 NSString* const kToolbarToolsMenuButtonIdentifier =
     @"kToolbarToolsMenuButtonIdentifier";
 NSString* const kToolbarStackButtonIdentifier =
     @"kToolbarStackButtonIdentifier";
 NSString* const kToolbarShareButtonIdentifier =
     @"kToolbarShareButtonIdentifier";
@@ skipping 960 matching lines @@
 #pragma mark -
 #pragma mark PopupMenuDelegate methods.
 
 - (void)dismissPopupMenu:(PopupMenuController*)controller {
   if ([controller isKindOfClass:[ToolsPopupController class]] &&
       (ToolsPopupController*)controller == toolsPopupController_)
     [self dismissToolsMenuPopup];
 }
 
 @end