Change return type of Tab -navigationManager.

ios/chrome/browser/ui/browser_view_controller_unittest.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 <Foundation/Foundation.h>
 #import <PassKit/PassKit.h>
 
 #include <memory>
 
 #include "base/command_line.h"
@@ skipping 70 matching lines @@
 @end
 
 @interface BVCTestTabMock : OCMockComplexTypeHelper {
   GURL url_;
   WebStateImpl* webState_;
 }
 
 @property(nonatomic, assign) const GURL& url;
 @property(nonatomic, assign) WebStateImpl* webState;
 
-- (NavigationManagerImpl*)navigationManager;
+- (web::NavigationManager*)navigationManager;
+- (web::NavigationManagerImpl*)navigationManagerImpl;
 
 @end
 
 @implementation BVCTestTabMock
 - (const GURL&)url {
   return url_;
 }
 - (void)setUrl:(const GURL&)url {
   url_ = url;
 }
 - (WebStateImpl*)webState {
   return webState_;
 }
 - (void)setWebState:(WebStateImpl*)webState {
   webState_ = webState;
 }
-- (NavigationManagerImpl*)navigationManager {
+- (web::NavigationManager*)navigationManager {
+  return &(webState_->GetNavigationManagerImpl());
+}
+- (web::NavigationManagerImpl*)navigationManagerImpl {
   return &(webState_->GetNavigationManagerImpl());
 }
 @end
 
 #pragma mark -
 
 namespace {
 class BrowserViewControllerTest : public BlockCleanupTest {
  public:
   BrowserViewControllerTest() {}
@@ skipping 418 matching lines @@
       static_cast<OCMockObject*>(shareController_.get());
   [[shareControllerMock expect] cancelShareAnimated:NO];
   EXPECT_CALL(*this, OnCompletionCalled());
   [bvc_ clearPresentedStateWithCompletion:^{
     this->OnCompletionCalled();
   }];
   EXPECT_OCMOCK_VERIFY(shareControllerMock);
 }
 
 }  // namespace