Removed -[CRWWebDelegate webController:titleDidChange:].

ios/web/web_state/ui/crw_web_controller.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/web/web_state/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #import <objc/runtime.h>
 #include <stddef.h>
@@ skipping 1001 matching lines @@
   // DCHECK([contentView.scrollView isDescendantOfView:contentView]);
   [_containerView displayTransientContent:contentView];
 }
 
 - (id<CRWWebDelegate>)delegate {
   return _delegate.get();
 }
 
 - (void)setDelegate:(id<CRWWebDelegate>)delegate {
   _delegate.reset(delegate);
-  if ([self.nativeController respondsToSelector:@selector(setDelegate:)]) {
-    if ([_delegate respondsToSelector:@selector(webController:titleDidChange:)])
-      [self.nativeController setDelegate:self];
-    else
-      [self.nativeController setDelegate:nil];
-  }
+  if ([self.nativeController respondsToSelector:@selector(setDelegate:)])
+    [self.nativeController setDelegate:self];
 }
 
 - (void)dealloc {
   DCHECK([NSThread isMainThread]);
   DCHECK(_isBeingDestroyed);  // 'close' must have been called already.
   DCHECK(!_webView);
   // TODO(crbug.com/662860): Don't set the delegate to nil.
   [_containerView setDelegate:nil];
   if ([self.nativeController respondsToSelector:@selector(setDelegate:)]) {
     [self.nativeController setDelegate:nil];
@@ skipping 41 matching lines @@
     @"loading" : @"webViewLoadingStateDidChange",
     @"title" : @"webViewTitleDidChange",
     @"URL" : @"webViewURLDidChange",
   }];
 
   return result;
 }
 
 // NativeControllerDelegate method, called to inform that title has changed.
 - (void)nativeContent:(id)content titleDidChange:(NSString*)title {
-  // Responsiveness to delegate method was checked in setDelegate:.
-  [_delegate webController:self titleDidChange:title];
+  _webStateImpl->OnTitleChanged();
 }
 
 - (void)setNativeControllerWebUsageEnabled:(BOOL)webUsageEnabled {
   if ([self.nativeController
           respondsToSelector:@selector(setWebUsageEnabled:)]) {
     [self.nativeController setWebUsageEnabled:webUsageEnabled];
   }
 }
 
 - (void)setWebUsageEnabled:(BOOL)enabled {
@@ skipping 267 matching lines @@
 
   base::string16 newTitle = base::SysNSStringToUTF16(title);
   if (item->GetTitle() == newTitle)
     return;
 
   item->SetTitle(newTitle);
   // TODO(crbug.com/546218): See if this can be removed; it's not clear that
   // other platforms send this (tab sync triggers need to be compared against
   // upstream).
   self.navigationManagerImpl->OnNavigationItemChanged();
-
-  if ([_delegate respondsToSelector:@selector(webController:titleDidChange:)]) {
-    [_delegate webController:self titleDidChange:title];
-  }
+  _webStateImpl->OnTitleChanged();
 }
 
 - (BOOL)isCurrentNavigationItemPOST {
   // |_pendingNavigationInfo| will be nil if the decidePolicy* delegate methods
   // were not called.
   NSString* HTTPMethod =
       _pendingNavigationInfo
           ? [_pendingNavigationInfo HTTPMethod]
           : [self currentBackForwardListItemHolder]->http_method();
   return [HTTPMethod isEqual:@"POST"];
@@ skipping 404 matching lines @@
   if (loadSuccess) {
     _webStateImpl->OnNavigationCommitted(currentURL);
   } else {
     _webStateImpl->OnErrorPageNavigation(currentURL);
   }
 
   // Perform post-load-finished updates.
   [self didFinishWithURL:currentURL loadSuccess:loadSuccess];
 
   NSString* title = [self.nativeController title];
-  if (title)
+  if (title) {
     [self setNavigationItemTitle:title];
+  }
 
-  // If the controller handles title change notification, route those to the
-  // delegate.
-  if ([_delegate respondsToSelector:@selector(webController:titleDidChange:)]) {
-    if ([self.nativeController respondsToSelector:@selector(setDelegate:)]) {
-      [self.nativeController setDelegate:self];
-    }
+  if ([self.nativeController respondsToSelector:@selector(setDelegate:)]) {
+    [self.nativeController setDelegate:self];
   }
 }
 
 - (void)loadErrorInNativeView:(NSError*)error {
   [self removeWebViewAllowingCachedReconstruction:NO];
   web::NavigationItem* item = [self currentNavItem];
   const GURL currentURL = item ? item->GetVirtualURL() : GURL::EmptyGURL();
 
   if (web::IsWKWebViewSSLCertError(error)) {
     // This could happen only if certificate is absent or could not be parsed.
@@ skipping 3419 matching lines @@
 - (void)simulateLoadRequestWithURL:(const GURL&)URL {
   _lastRegisteredRequestURL = URL;
   _loadPhase = web::LOAD_REQUESTED;
 }
 
 - (NSString*)referrerFromNavigationAction:(WKNavigationAction*)action {
   return [action.request valueForHTTPHeaderField:kReferrerHeaderName];
 }
 
 @end