[ObjC ARC] Converts ios/chrome/browser/ui/toolbar:test_support to ARC.

ios/chrome/browser/ui/toolbar/test_toolbar_model_ios.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.
 
 #include "ios/chrome/browser/ui/toolbar/test_toolbar_model_ios.h"
 
 #include "components/toolbar/toolbar_model_impl.h"
 #import "ios/chrome/browser/tabs/tab.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 TestToolbarModelIOS::TestToolbarModelIOS()
     : ToolbarModelIOS(),
       is_loading_(FALSE),

[rohitrao (ping after 24h), 2017/04/25 06:44:12]

These should be false instead of FALSE, if you feel like making that cleanup
change while you're in here.

[gambard, 2017/04/25 11:37:50]

Done.

       load_progress_fraction_(0.0),
       can_go_back_(FALSE),
       can_go_forward_(FALSE),
       is_current_tab_native_page_(FALSE),
       is_current_tab_bookmarked_(FALSE) {
   test_toolbar_model_.reset(new TestToolbarModel());
 }
 
 TestToolbarModelIOS::~TestToolbarModelIOS() {}
 
@@ skipping 26 matching lines @@
 }
 
 bool TestToolbarModelIOS::IsCurrentTabBookmarkedByUser() {
   return is_current_tab_bookmarked_;
 }
 
 bool TestToolbarModelIOS::ShouldDisplayHintText() {
   return false;
 }