[ios] Adds LocationBarCoordinator.

ios/shared/chrome/browser/ui/omnibox/location_bar_delegate.h

 // Copyright 2017 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.
 
 #ifndef IOS_SHARED_CHROME_BROWSER_UI_OMNIBOX_LOCATION_BAR_DELEGATE_H_
 #define IOS_SHARED_CHROME_BROWSER_UI_OMNIBOX_LOCATION_BAR_DELEGATE_H_
 
 #import <Foundation/Foundation.h>
 
+#include "ui/base/page_transition_types.h"
+
+class GURL;
+class ToolbarModel;
+
 namespace web {
 class WebState;
 }
 
-class ToolbarModel;
-
 // Delegate for LocationBarController objects.  Used to provide the location bar
 // a way to open URLs and otherwise interact with the browser.
 @protocol LocationBarDelegate
 - (void)loadGURLFromLocationBar:(const GURL&)url
                      transition:(ui::PageTransition)transition;
 - (void)locationBarHasBecomeFirstResponder;
 - (void)locationBarHasResignedFirstResponder;
 - (void)locationBarBeganEdit;
 - (void)locationBarChanged;
 - (web::WebState*)getWebState;
 - (ToolbarModel*)toolbarModel;
 @end
 
 #endif  // IOS_SHARED_CHROME_BROWSER_UI_OMNIBOX_LOCATION_BAR_DELEGATE_H_