Make BrowserCoordinator use a Browser instead of a BrowserState

ios/clean/chrome/browser/browser_coordinator.h

 // 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.
 
 // ======                        New Architecture                         =====
 // =         This code is only used in the new iOS Chrome architecture.       =
 // ============================================================================
 
 #ifndef IOS_CLEAN_CHROME_BROWSER_BROWSER_COORDINATOR_H_
 #define IOS_CLEAN_CHROME_BROWSER_BROWSER_COORDINATOR_H_
 
 #import <UIKit/UIKit.h>
 
+class Browser;
 @class CoordinatorContext;
-namespace ios {
-class ChromeBrowserState;
-}
 
 // An object that manages a UI component via a view controller.
 // This is the public interface to this class; subclasses should also import
 // the Internal category header (browser_coordinator+internal.h). This header
 // file declares all the methods and properties a subclass must either override,
 // call, or reset.
 @interface BrowserCoordinator : NSObject
 
 // The context object for this coordinator.
 @property(nonatomic, strong, readonly) CoordinatorContext* context;
 
-// The browser state used by this coordinator and passed into any child
+// The browser object used by this coordinator and passed into any child
 // coordinators added to it. This is a weak pointer, and setting this property
-// doesn't transfer ownership of the browser state.
-@property(nonatomic, assign) ios::ChromeBrowserState* browserState;
+// doesn't transfer ownership of the browser.
+@property(nonatomic, assign) Browser* browser;
 
 // The basic lifecycle methods for coordinators are -start and -stop. These
 // are blank template methods; child classes are expected to implement them and
 // do not need to invoke the superclass methods.
 // Starts the user interaction managed by the receiver. Typical implementations
 // will create a view controller and then use |baseViewController| to present
 // it.
 - (void)start;
 
 // Stops the user interaction managed by the receiver.
 - (void)stop;
 
 @end
 
 #endif  // IOS_CLEAN_CHROME_BROWSER_BROWSER_COORDINATOR_H_