Adding tools menu responsiveness metric.

ios/chrome/browser/ui/browser_view_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/browser_view_controller.h"
 
 #import <AssetsLibrary/AssetsLibrary.h>
 #import <MobileCoreServices/MobileCoreServices.h>
 #import <PassKit/PassKit.h>
 #import <Photos/Photos.h>
@@ skipping 3366 matching lines @@
     // doing, and what the PM want, but it doesn't make it right.
   }
 }
 
 #pragma mark - Showing popups
 
 - (void)showToolsMenuPopup {
   DCHECK(_browserState);
   DCHECK(self.visible || self.dismissingModal);
 
+  // Record the time this menu was requested; to be stored in the configuration
+  // object.
+  NSDate* showToolsMenuPopupRequestDate = [NSDate date];
+
   // Dismiss the omnibox (if open).
   [_toolbarController cancelOmniboxEdit];
   // Dismiss the soft keyboard (if open).
   [[_model currentTab].webController dismissKeyboard];
   // Dismiss Find in Page focus.
   [self updateFindBar:NO shouldFocus:NO];
 
   ToolsMenuConfiguration* configuration =
       [[ToolsMenuConfiguration alloc] initWithDisplayView:[self view]];
+  configuration.requestStartTime =
+      showToolsMenuPopupRequestDate.timeIntervalSinceReferenceDate;
   if ([_model count] == 0)
     [configuration setNoOpenedTabs:YES];
 
   if (_isOffTheRecord)
     [configuration setInIncognito:YES];
 
   if (!_readingListMenuNotifier) {
     _readingListMenuNotifier = [[ReadingListMenuNotifier alloc]
         initWithReadingList:ReadingListModelFactory::GetForBrowserState(
                                 _browserState)];
@@ skipping 1763 matching lines @@
 
 - (UIView*)voiceSearchButton {
   return _voiceSearchButton;
 }
 
 - (id<LogoAnimationControllerOwner>)logoAnimationControllerOwner {
   return [self currentLogoAnimationControllerOwner];
 }
 
 @end