[ios] Added NavigationManager::LoadURLWithParams public API.

ios/web/shell/view_controller.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/shell/view_controller.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 26 matching lines @@
 @interface ViewController ()<CRWWebStateObserver> {
   web::BrowserState* _browserState;
   base::scoped_nsobject<CRWWebController> _webController;
   scoped_ptr<web::RequestTrackerFactoryImpl> _requestTrackerFactory;
   scoped_ptr<web::WebHTTPProtocolHandlerDelegate> _httpProtocolDelegate;
   scoped_ptr<web::WebStateObserverBridge> _webStateObserver;
 
   base::mac::ObjCPropertyReleaser _propertyReleaser_ViewController;
 }
 @property(nonatomic, assign, readonly) web::WebState* webState;
+@property(nonatomic, assign, readonly) NavigationManager* navigationManager;
 @property(nonatomic, readwrite, retain) UITextField* field;
 @end
 
 @implementation ViewController
 
 @synthesize field = _field;
 @synthesize containerView = _containerView;
 @synthesize toolbarView = _toolbarView;
 
 - (instancetype)initWithBrowserState:(web::BrowserState*)browserState {
@@ skipping 65 matching lines @@
   [_webController setWebUsageEnabled:YES];
 
   _webStateObserver.reset(new web::WebStateObserverBridge(self.webState, self));
 
   UIView* view = self.webState->GetView();
   [view setFrame:[_containerView bounds]];
   [_containerView addSubview:view];
 
   NavigationManager::WebLoadParams params(GURL("https://dev.chromium.org/"));
   params.transition_type = ui::PAGE_TRANSITION_TYPED;
-  [_webController loadWithParams:params];
+  self.navigationManager->LoadURLWithParams(params);
 }
 
 - (web::WebState*)webState {
   return [_webController webState];
 }
 
+- (NavigationManager*)navigationManager {
+  return self.webState->GetNavigationManager();
+}
+
 - (void)setUpNetworkStack {
   // Disable the default cache.
   [NSURLCache setSharedURLCache:[EmptyNSURLCache emptyNSURLCache]];
 
   _httpProtocolDelegate.reset(new web::WebHTTPProtocolHandlerDelegate(
       _browserState->GetRequestContext()));
   net::HTTPProtocolHandlerDelegate::SetInstance(_httpProtocolDelegate.get());
   BOOL success = [NSURLProtocol registerClass:[CRNHTTPProtocolHandler class]];
   DCHECK(success);
   // The CRWURLVerifyingProtocolHandler is used to verify URL in the
@@ skipping 13 matching lines @@
 }
 
 - (UIBarPosition)positionForBar:(id<UIBarPositioning>)bar {
   if (bar == _toolbarView) {
     return UIBarPositionTopAttached;
   }
   return UIBarPositionAny;
 }
 
 - (void)back {
-  NavigationManager* navManager = self.webState->GetNavigationManager();
-  if (navManager->CanGoBack()) {
-    navManager->GoBack();
+  if (self.navigationManager->CanGoBack()) {
+    self.navigationManager->GoBack();
   }
 }
 
 - (void)forward {
-  NavigationManager* navManager = self.webState->GetNavigationManager();
-  if (navManager->CanGoForward()) {
-    navManager->GoForward();
+  if (self.navigationManager->CanGoForward()) {
+    self.navigationManager->GoForward();
   }
 }
 
 - (BOOL)textFieldShouldReturn:(UITextField*)field {
   GURL URL = GURL(base::SysNSStringToUTF8([field text]));
 
   // Do not try to load invalid URLs.
   if (URL.is_valid()) {
     NavigationManager::WebLoadParams params(URL);
     params.transition_type = ui::PAGE_TRANSITION_TYPED;
-    [_webController loadWithParams:params];
+    self.navigationManager->LoadURLWithParams(params);
   }
 
   [field resignFirstResponder];
   [self updateToolbar];
   return YES;
 }
 
 - (void)updateToolbar {
   // Do not update the URL if the text field is currently being edited.
   if ([_field isFirstResponder]) {
@@ skipping 162 matching lines @@
 - (void)webWillFinishHistoryNavigationFromEntry:(CRWSessionEntry*)fromEntry {
 }
 - (int)downloadImageAtUrl:(const GURL&)url
             maxBitmapSize:(uint32_t)maxBitmapSize
                  callback:
                      (const web::WebState::ImageDownloadCallback&)callback {
   return -1;
 }
 
 @end