Replaced webPageOrderedClose with WebStateDelegate API.

ios/chrome/browser/tabs/tab.mm

 // Copyright 2012 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/chrome/browser/tabs/tab.h"
 
 #import <CoreLocation/CoreLocation.h>
 #import <UIKit/UIKit.h>
 
 #include <utility>
@@ skipping 335 matching lines @@
 
 // Adds the current session entry to this history database.
 - (void)addCurrentEntryToHistoryDB;
 
 // Adds any cached entries from |addPageVector_| to the history DB.
 - (void)commitCachedEntriesToHistoryDB;
 
 // Returns the OpenInController for this tab.
 - (OpenInController*)openInController;
 
-// Calls the model and ask to close this tab.
-- (void)closeThisTab;
-
 // Initialize the Native App Launcher controller.
 - (void)initNativeAppNavigationController;
 
 // Opens a link in an external app. Returns YES iff |url| is launched in an
 // external app.
 - (BOOL)openExternalURL:(const GURL&)url linkClicked:(BOOL)linkClicked;
 
 // Handles exportable files if possible.
 - (void)handleExportableFile:(net::HttpResponseHeaders*)headers;
 
@@ skipping 1053 matching lines @@
 
 - (OpenInController*)openInController {
   if (!openInController_) {
     openInController_.reset([[OpenInController alloc]
         initWithRequestContext:browserState_->GetRequestContext()
                  webController:self.webController]);
   }
   return openInController_.get();
 }
 
-- (void)closeThisTab {
-  if (!parentTabModel_)
-    return;
-
-  NSUInteger index = [parentTabModel_ indexOfTab:self];
-  if (index != NSNotFound)
-    [parentTabModel_ closeTabAtIndex:index];
-}
-
 - (id<CRWNativeContent>)controllerForUnhandledContentAtURL:(const GURL&)url {
   // Shows download manager UI for unhandled content.
   DownloadManagerController* downloadController =
       [[[DownloadManagerController alloc] initWithWebState:self.webState
                                                downloadURL:url] autorelease];
   [downloadController start];
   return downloadController;
 }
 
 - (void)handleExportableFile:(net::HttpResponseHeaders*)headers {
@@ skipping 148 matching lines @@
   snapshotOverlayProvider_.reset(snapshotOverlayProvider);
 }
 
 - (void)evaluateU2FResultFromURL:(const GURL&)URL {
   DCHECK(U2FController_);
   [U2FController_ evaluateU2FResultFromU2FURL:URL webState:self.webState];
 }
 
 #pragma mark - CRWWebDelegate and CRWWebStateObserver protocol methods.
 
-// The web page wants to close its own window.
-- (void)webPageOrderedClose {
-  // Only allow a web page to close itself if it was opened by DOM, or if there
-  // are no navigation items.
-  DCHECK([[self navigationManagerImpl]->GetSessionController() isOpenedByDOM] ||
-         ![self navigationManager]->GetItemCount());
-  [self closeThisTab];
-}
-
 // This method is invoked whenever the system believes the URL is about to
 // change, or immediately after any unexpected change of the URL. The apparent
 // destination URL is included in the |url| parameter.
 // Warning: because of the present design it is possible for malicious websites
 // to invoke superflous instances of this delegate with artibrary URLs.
 // Ensure there is nothing here that could be a risk to the user beyond mild
 // confusion in that event (e.g. progress bar starting unexpectedly).
 - (void)webWillAddPendingURL:(const GURL&)url
                   transition:(ui::PageTransition)transition {
   DCHECK(self.webController.loadPhase == web::LOAD_REQUESTED);
@@ skipping 551 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end