Adding tools menu responsiveness metric.

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

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #include <stdint.h>
 
 #include <map>
 
 #include "base/ios/weak_nsobject.h"
 #import "base/mac/scoped_nsobject.h"
 #include "ios/chrome/browser/ui/rtl_geometry.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_popup_controller.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/ui/util/relaxed_bounds_constraints_hittest.h"
 
 class ReadingListModel;
 @class ToolsMenuConfiguration;
 
 // The time delay before non-initial button images are loaded.
 extern const int64_t kNonInitialImageAdditionDelayNanosec;
-// Notification when the tools menu is opened.
+// Notification that the tools menu has been requested to be shown.
 extern NSString* const kMenuWillShowNotification;
-// Notification when the tools menu is closed.
+// Notification that the tools menu has completed its animation on screen.
+extern NSString* const kMenuDidShowNotification;
+// Notification that the tools menu is closed.
 extern NSString* const kMenuWillHideNotification;
 // Accessibility identifier of the toolbar view (for use by integration tests).
 extern NSString* const kToolbarIdentifier;
 // Accessibility identifier of the incognito toolbar view (for use by
 // integration tests).
 extern NSString* const kIncognitoToolbarIdentifier;
 // Accessibility identifier of the tools menu button (for use by integration
 // tests).
 extern NSString* const kToolbarToolsMenuButtonIdentifier;
 // Accessibility identifier of the stack button (for use by integration
@@ skipping 241 matching lines @@
 
 // Called when transition animations can be removed.
 - (void)cleanUpTransitionAnimations;
 
 // Shows/hides iPhone toolbar views for when the new tab page is displayed.
 - (void)hideViewsForNewTabPage:(BOOL)hide;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_CONTROLLER_H_