Adding tools menu responsiveness metric.

ios/chrome/browser/ui/tools_menu/tools_menu_view_controller.mm

 // Copyright 2014 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/tools_menu/tools_menu_view_controller.h"
 
 #include <stdint.h>
 
 #include "base/ios/ios_util.h"
 #import "base/ios/weak_nsobject.h"
 #include "base/logging.h"
 #include "base/mac/objc_property_releaser.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/metrics/field_trial.h"
 #include "components/strings/grit/components_strings.h"
 #include "ios/chrome/browser/experimental_flags.h"
 #import "ios/chrome/browser/ui/animation_util.h"
 #import "ios/chrome/browser/ui/commands/UIKit+ChromeExecuteCommand.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 #import "ios/chrome/browser/ui/reading_list/reading_list_menu_notification_delegate.h"
 #import "ios/chrome/browser/ui/reading_list/reading_list_menu_notifier.h"
+#import "ios/chrome/browser/ui/toolbar/toolbar_controller.h"
 #import "ios/chrome/browser/ui/tools_menu/reading_list_menu_view_item.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_menu_constants.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_menu_model.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_menu_view_item.h"
 #import "ios/chrome/browser/ui/tools_menu/tools_menu_view_tools_cell.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/uikit_ui_util.h"
 #import "ios/chrome/common/material_timing.h"
 #include "ios/chrome/grit/ios_strings.h"
@@ skipping 395 matching lines @@
           subarrayWithRange:NSMakeRange(1, [visibleCells count] - 1)];
     } else {
       toolsCell = nil;
     }
   }
 
   [CATransaction begin];
   [CATransaction
       setAnimationTimingFunction:TimingFunction(ios::material::CurveEaseInOut)];
   [CATransaction setAnimationDuration:ios::material::kDuration5];
+  [CATransaction setCompletionBlock:^{
+    [[NSNotificationCenter defaultCenter]
+        postNotificationName:kMenuDidShowNotification
+                      object:nil];
+  }];
   AnimateInViews([toolsCell allButtons], 10, 0);
   AnimateInViews(visibleCells, 0, -10);
   [CATransaction commit];
 
   [[self readingListCell]
       updateBadgeCount:_readingListMenuNotifier.get().readingListUnreadCount
               animated:YES];
   [[self readingListCell]
       updateSeenState:_readingListMenuNotifier.get().readingListUnseenItemsExist
              animated:YES];
@@ skipping 162 matching lines @@
 
 - (void)unreadCountChanged:(NSInteger)unreadCount {
   [[self readingListCell] updateBadgeCount:unreadCount animated:YES];
 }
 
 - (void)unseenStateChanged:(BOOL)unseenItemsExist {
   [[self readingListCell] updateSeenState:unseenItemsExist animated:YES];
 }
 
 @end