Removed -[CRWWebDelegate webController:titleDidChange:].

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 1794 matching lines @@
 
 - (BOOL)webController:(CRWWebController*)webController
     shouldOpenExternalURL:(const GURL&)URL {
   if (isPrerenderTab_ && !isLinkLoadingPrerenderTab_) {
     [delegate_ discardPrerender];
     return NO;
   }
   return YES;
 }
 
-- (void)webController:(CRWWebController*)webController
-       titleDidChange:(NSString*)title {
+- (void)webStateDidChangeTitle:(web::WebState*)webState {

[kkhorimoto, 2017/02/28 01:14:55]

Let's move this function next to the other WSO callbacks and keep the ordering
consistent with their ordering in web_state_observer.h

[Eugene But (OOO till 7-30), 2017/02/28 01:26:45]

Done.

   [self saveTitleToHistoryDB];
   [parentTabModel_ notifyTabChanged:self];
 }
 
 - (BOOL)urlTriggersNativeAppLaunch:(const GURL&)url
                          sourceURL:(const GURL&)sourceURL
                        linkClicked:(BOOL)linkClicked {
   // Don't open any native app directly when prerendering or from Incognito.
   if (isPrerenderTab_ || self.browserState->IsOffTheRecord())
     return NO;
@@ skipping 379 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end