[ObjC ARC] Converts ios/chrome/browser/ui/webui/history:history to ARC.Automatically generated AR…

ios/chrome/browser/ui/webui/history/history_ui.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/webui/history/history_ui.h"
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 11 matching lines @@
 #include "ios/chrome/browser/signin/signin_manager_factory.h"
 #include "ios/chrome/browser/ui/webui/history/browsing_history_handler.h"
 #include "ios/chrome/browser/ui/webui/history/metrics_handler.h"
 #include "ios/chrome/grit/ios_resources.h"
 #include "ios/web/public/web_state/web_state.h"
 #include "ios/web/public/web_ui_ios_data_source.h"
 #include "ios/web/public/webui/web_ui_ios.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 static const char kStringsJsFile[] = "strings.js";
 static const char kHistoryJsFile[] = "history.js";
 static const char kOtherDevicesJsFile[] = "other_devices.js";
 
 namespace {
 
 const char kIncognitoModeShortcut[] =
     "("
     "\xE2\x87\xA7"  // Shift symbol (U+21E7 'UPWARDS WHITE ARROW').
     "\xE2\x8C\x98"  // Command symbol (U+2318 'PLACE OF INTEREST SIGN').
@@ skipping 116 matching lines @@
 }
 
 HistoryUI::~HistoryUI() {}
 
 // static
 base::RefCountedMemory* HistoryUI::GetFaviconResourceBytes(
     ui::ScaleFactor scale_factor) {
   return ResourceBundle::GetSharedInstance().LoadDataResourceBytesForScale(
       IDR_HISTORY_FAVICON, scale_factor);
 }