Make BrowserCoordinator use a Browser instead of a BrowserState

ios/clean/chrome/browser/browser_coordinator.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.
 
 // ======                        New Architecture                         =====
 // =         This code is only used in the new iOS Chrome architecture.       =
 // ============================================================================
 
 #import "base/logging.h"
 #import "ios/clean/chrome/browser/browser_coordinator+internal.h"
 #import "ios/clean/chrome/browser/browser_coordinator.h"
 #import "ios/shared/chrome/browser/coordinator_context/coordinator_context.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @interface BrowserCoordinator ()
 // Child coordinators owned by this object.
 @property(nonatomic, strong)
     NSMutableSet<BrowserCoordinator*>* childCoordinators;
 // Parent coordinator of this object, if any.
 @property(nonatomic, readwrite, weak) BrowserCoordinator* parentCoordinator;
 @property(nonatomic, readwrite) BOOL overlaying;
 @end
 
 @implementation BrowserCoordinator
 
 @synthesize context = _context;
-@synthesize browserState = _browserState;
+@synthesize browser = _browser;
 @synthesize childCoordinators = _childCoordinators;
 @synthesize parentCoordinator = _parentCoordinator;
 @synthesize overlaying = _overlaying;
 
 - (instancetype)init {
   if (self = [super init]) {
     _context = [[CoordinatorContext alloc] init];
     _childCoordinators = [NSMutableSet set];
   }
   return self;
@@ skipping 18 matching lines @@
 - (NSSet*)children {
   return [self.childCoordinators copy];
 }
 
 - (void)addChildCoordinator:(BrowserCoordinator*)coordinator {
   CHECK([self respondsToSelector:@selector(viewController)])
       << "BrowserCoordinator implementations must provide a viewController "
          "property.";
   [self.childCoordinators addObject:coordinator];
   coordinator.parentCoordinator = self;
-  coordinator.browserState = self.browserState;
+  coordinator.browser = self.browser;
   coordinator.context.baseViewController = self.viewController;
 }
 
 - (BrowserCoordinator*)overlayCoordinator {
   if (self.overlaying)
     return self;
   for (BrowserCoordinator* child in self.children) {
     BrowserCoordinator* overlay = child.overlayCoordinator;
     if (overlay)
       return overlay;
@@ skipping 36 matching lines @@
 }
 
 - (void)removeChildCoordinator:(BrowserCoordinator*)coordinator {
   if (![self.childCoordinators containsObject:coordinator])
     return;
   [self.childCoordinators removeObject:coordinator];
   coordinator.parentCoordinator = nil;
 }
 
 @end