Let CRIWVWebView inherit UIView instead of NSObject.

ios/web_view/internal/criwv.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/public/criwv.h"
 
 #include <memory>
 
 #include "base/location.h"
 #import "base/mac/bind_objc_block.h"
 #include "base/single_thread_task_runner.h"
 #include "ios/web/public/app/web_main.h"
 #include "ios/web/public/web_thread.h"
 #include "ios/web_view/internal/criwv_browser_state.h"
 #import "ios/web_view/internal/criwv_web_client.h"
 #import "ios/web_view/internal/criwv_web_main_delegate.h"
-#import "ios/web_view/internal/criwv_web_view_impl.h"
+#import "ios/web_view/internal/criwv_web_view_internal.h"
 #import "ios/web_view/public/criwv_delegate.h"
 
 namespace {
 CRIWV* g_criwv = nil;
 }
 
 @interface CRIWV () {
   id<CRIWVDelegate> _delegate;
   std::unique_ptr<ios_web_view::CRIWVWebMainDelegate> _webMainDelegate;
   std::unique_ptr<web::WebMain> _webMain;
 }
 
 - (instancetype)initWithDelegate:(id<CRIWVDelegate>)delegate;
 - (ios_web_view::CRIWVBrowserState*)browserState;
 @end
 
 @implementation CRIWV
 
 + (void)configureWithDelegate:(id<CRIWVDelegate>)delegate {
   g_criwv = [[CRIWV alloc] initWithDelegate:delegate];
 }
 
 + (void)shutDown {
   [g_criwv release];
   g_criwv = nil;
 }
 
-+ (id<CRIWVWebView>)webView {
-  return [[[CRIWVWebViewImpl alloc] initWithBrowserState:[g_criwv browserState]]
-      autorelease];
++ (CRIWVWebView*)webViewWithFrame:(CGRect)frame {
+  return
+      [[[CRIWVWebView alloc] initWithFrame:frame
+                              browserState:[g_criwv browserState]] autorelease];
 }
 
 - (instancetype)initWithDelegate:(id<CRIWVDelegate>)delegate {
   self = [super init];
   if (self) {
     _delegate = delegate;
     _webMainDelegate.reset(new ios_web_view::CRIWVWebMainDelegate(_delegate));
     web::WebMainParams params(_webMainDelegate.get());
     _webMain.reset(new web::WebMain(params));
   }
   return self;
 }
 
 - (void)dealloc {
   _webMain.reset();
   _webMainDelegate.reset();
   [super dealloc];
 }
 
 - (ios_web_view::CRIWVBrowserState*)browserState {
   ios_web_view::CRIWVWebClient* client =
       static_cast<ios_web_view::CRIWVWebClient*>(web::GetWebClient());
   return client->browser_state();
 }
 
 @end