Remove CWV class and move setting User Agent to CWVWebViewConfiguration.

ios/web_view/public/cwv.h

-// 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.
-
-#ifndef IOS_WEB_VIEW_PUBLIC_CWV_H_
-#define IOS_WEB_VIEW_PUBLIC_CWV_H_
-
-#import <ChromeWebView/cwv_export.h>
-#import <CoreGraphics/CoreGraphics.h>
-#import <Foundation/Foundation.h>
-
-@class CWVWebView;
-
-// Main interface for the CWV library.
-CWV_EXPORT
-@interface CWV : NSObject
-
-// Initializes the CWV library. This function should be called from
-// |application:didFinishLaunchingWithOptions:|. The |userAgent| string may be
-// used to customize the full User Agent string used by web views. It should be
-// of the format "product/1.0".
-+ (void)configureWithUserAgentProductName:(NSString*)productName;
-
-// Shuts down the CWV library.  This function should be called from
-// |applicationwillTerminate:|.
-+ (void)shutDown;
-
-// Creates and returns a web view.
-+ (CWVWebView*)webViewWithFrame:(CGRect)frame;
-
-@end
-
-#endif  // IOS_WEB_VIEW_PUBLIC_CWV_H_