Remove CWV class and move setting User Agent to CWVWebViewConfiguration.

ios/web_view/shell/shell_app_delegate.m

 // Copyright 2014 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/web_view/shell/shell_app_delegate.h"
 
 #import <ChromeWebView/ChromeWebView.h>
 
 #import "ios/web_view/shell/shell_view_controller.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @implementation ShellAppDelegate
 
 @synthesize window = _window;
 
 - (BOOL)application:(UIApplication*)application
     didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
   self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
   self.window.backgroundColor = [UIColor whiteColor];
 
-  [CWV configureWithUserAgentProductName:@"Dummy/1.0"];
+  [CWVWebViewConfiguration setUserAgentProductName:@"Dummy/1.0"];
 
   [self.window makeKeyAndVisible];
 
   ShellViewController* controller = [[ShellViewController alloc] init];
   self.window.rootViewController = controller;
 
   return YES;
 }
 
 - (void)applicationWillResignActive:(UIApplication*)application {
 }
 
 - (void)applicationDidEnterBackground:(UIApplication*)application {
 }
 
 - (void)applicationWillEnterForeground:(UIApplication*)application {
 }
 
 - (void)applicationDidBecomeActive:(UIApplication*)application {
 }
 
 - (void)applicationWillTerminate:(UIApplication*)application {
 }
 
 @end