Replace prefix of ios/web_view C++ classes.

ios/web_view/internal/criwv_web_main_delegate.mm

-// 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/internal/criwv_web_main_delegate.h"
-
-#include "base/memory/ptr_util.h"
-#import "ios/web_view/internal/criwv_web_client.h"
-#import "ios/web_view/public/cwv_delegate.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace ios_web_view {
-
-CRIWVWebMainDelegate::CRIWVWebMainDelegate(id<CWVDelegate> delegate)
-    : delegate_(delegate) {}
-
-CRIWVWebMainDelegate::~CRIWVWebMainDelegate() {}
-
-void CRIWVWebMainDelegate::BasicStartupComplete() {
-  web_client_ = base::MakeUnique<CRIWVWebClient>(delegate_);
-  web::SetWebClient(web_client_.get());
-}
-
-}  // namespace ios_web_view