Cleaned up unused methods from WebStateImpl and NavigationContextImpl.

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 1325 matching lines @@
                        web::ReferrerPolicyAlways);
 }
 
 - (void)pushStateWithPageURL:(const GURL&)pageURL
                  stateObject:(NSString*)stateObject
                   transition:(ui::PageTransition)transition {
   _webStateImpl->OnProvisionalNavigationStarted(pageURL);
   [[self sessionController] pushNewItemWithURL:pageURL
                                    stateObject:stateObject
                                     transition:transition];
-  std::unique_ptr<web::NavigationContext> context =
-      web::NavigationContextImpl::CreateSameDocumentNavigationContext(
-          _webStateImpl, pageURL);
+  std::unique_ptr<web::NavigationContextImpl> context =
+      web::NavigationContextImpl::CreateNavigationContext(_webStateImpl,
+                                                          pageURL);
+  context->SetIsSameDocument(true);
   _webStateImpl->OnNavigationFinished(context.get());
   self.userInteractionRegistered = NO;
 }
 
 - (void)replaceStateWithPageURL:(const GURL&)pageURL
                     stateObject:(NSString*)stateObject {
   _webStateImpl->OnProvisionalNavigationStarted(pageURL);
   [[self sessionController] updateCurrentItemWithURL:pageURL
                                          stateObject:stateObject];
-  std::unique_ptr<web::NavigationContext> context =
-      web::NavigationContextImpl::CreateSameDocumentNavigationContext(
-          _webStateImpl, pageURL);
+  std::unique_ptr<web::NavigationContextImpl> context =
+      web::NavigationContextImpl::CreateNavigationContext(_webStateImpl,
+                                                          pageURL);
+  context->SetIsSameDocument(true);
   _webStateImpl->OnNavigationFinished(context.get());
 }
 
 - (void)setDocumentURL:(const GURL&)newURL {
   if (newURL != _documentURL && newURL.is_valid()) {
     _documentURL = newURL;
     _interactionRegisteredSinceLastURLChange = NO;
   }
 }
 
@@ skipping 3788 matching lines @@
 - (NSUInteger)observerCount {
   DCHECK_EQ(_observerBridges.size(), [_observers count]);
   return [_observers count];
 }
 
 - (NSString*)referrerFromNavigationAction:(WKNavigationAction*)action {
   return [action.request valueForHTTPHeaderField:kReferrerHeaderName];
 }
 
 @end