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
     willFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
   // Note that initialization of the window and the root view controller must be
   // done here, not in -application:didFinishLaunchingWithOptions: when state
   // restoration is supported.
 
   self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
   self.window.backgroundColor = [UIColor whiteColor];
 
-  [CWV configureWithUserAgentProductName:@"Dummy/1.0"];
-
   ShellViewController* controller = [[ShellViewController alloc] init];
   // Gives a restoration identifier so that state restoration works.
   controller.restorationIdentifier = @"rootViewController";
   self.window.rootViewController = controller;
 
   return YES;
 }
 
 - (BOOL)application:(UIApplication*)application
     didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
@@ skipping 21 matching lines @@
   return YES;
 }
 
 - (BOOL)application:(UIApplication*)application
     shouldRestoreApplicationState:(NSCoder*)coder {
   // TODO(crbug.com/710329): Make this value configurable in the settings.
   return YES;
 }
 
 @end