[ios] Adds history user action metrics

ios/chrome/browser/ui/history/history_collection_view_controller.mm

 // Copyright 2016 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.
 
 #include "ios/chrome/browser/ui/history/history_collection_view_controller.h"
 
 #import <MobileCoreServices/MobileCoreServices.h>
 
 #include <memory>
 
 #import "base/ios/weak_nsobject.h"
 #include "base/mac/foundation_util.h"
 #import "base/mac/objc_property_releaser.h"
 #include "base/mac/scoped_nsobject.h"
+#include "base/metrics/user_metrics.h"
+#include "base/metrics/user_metrics_action.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/browsing_data/core/history_notice_utils.h"
 #include "components/strings/grit/components_strings.h"
 #include "components/url_formatter/url_formatter.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #import "ios/chrome/browser/signin/authentication_service.h"
 #include "ios/chrome/browser/signin/authentication_service_factory.h"
 #include "ios/chrome/browser/sync/sync_setup_service.h"
@@ skipping 449 matching lines @@
 - (void)collectionView:(UICollectionView*)collectionView
     didSelectItemAtIndexPath:(NSIndexPath*)indexPath {
   [super collectionView:collectionView didSelectItemAtIndexPath:indexPath];
 
   if (self.isEditing) {
     [self.delegate historyCollectionViewControllerDidChangeEntrySelection:self];
   } else {
     HistoryEntryItem* item = base::mac::ObjCCastStrict<HistoryEntryItem>(
         [self.collectionViewModel itemAtIndexPath:indexPath]);
     [self openURL:item.URL];
+    if (self.isSearching) {
+      base::RecordAction(
+          base::UserMetricsAction("HistoryPage_SearchResultClick"));
+    } else {
+      base::RecordAction(base::UserMetricsAction("HistoryPage_EntryLinkClick"));
+    }
   }
 }
 
 - (void)collectionView:(UICollectionView*)collectionView
     didDeselectItemAtIndexPath:(NSIndexPath*)indexPath {
   [super collectionView:collectionView didDeselectItemAtIndexPath:indexPath];
   [self.delegate historyCollectionViewControllerDidChangeEntrySelection:self];
 }
 
 - (void)collectionView:(UICollectionView*)collectionView
@@ skipping 314 matching lines @@
   NSData* plainText = [base::SysUTF8ToNSString(URL.spec())
       dataUsingEncoding:NSUTF8StringEncoding];
   NSDictionary* copiedItem = @{
     (NSString*)kUTTypeURL : net::NSURLWithGURL(URL),
     (NSString*)kUTTypeUTF8PlainText : plainText,
   };
   [[UIPasteboard generalPasteboard] setItems:@[ copiedItem ]];
 }
 
 @end