[ios] RootCoordinator and view controller.

ios/chrome/browser/chrome_root_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.
 
-#import "ios/chrome/browser/root_coordinator.h"
+#import "ios/chrome/browser/chrome_root_coordinator.h"
 
 #include "base/logging.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
-@implementation RootCoordinator
+@implementation ChromeRootCoordinator
 @synthesize window = _window;
 
 - (instancetype)initWithWindow:(UIWindow*)window {
   if ((self = [super initWithBaseViewController:nil])) {
     _window = window;
   }
   return self;
 }
 
 - (instancetype)initWithBaseViewController:(UIViewController*)viewController {
   NOTREACHED();
   return nil;
 }
 
 @end