Pass NavigationContext to WebStateImpl::OnNavigationStarted.

ios/web/web_state/web_state_impl_unittest.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/web_state/web_state_impl.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 347 matching lines @@
             observer->did_finish_navigation_info()->web_state);
   NavigationContext* actual_context =
       observer->did_finish_navigation_info()->context.get();
   EXPECT_EQ(context->GetUrl(), actual_context->GetUrl());
   EXPECT_FALSE(actual_context->IsSameDocument());
   EXPECT_FALSE(actual_context->IsErrorPage());
   EXPECT_FALSE(actual_context->GetResponseHeaders());
 
   // Test that OnNavigationFinished() is called.
   ASSERT_FALSE(observer->start_provisional_navigation_info());
-  web_state_->OnProvisionalNavigationStarted(url);
+  web_state_->OnNavigationStarted(context.get());
   ASSERT_TRUE(observer->start_provisional_navigation_info());
   EXPECT_EQ(web_state_.get(),
             observer->start_provisional_navigation_info()->web_state);
   EXPECT_EQ(url, observer->start_provisional_navigation_info()->url);
 
   // Test that NavigationItemsPruned() is called.
   ASSERT_FALSE(observer->navigation_items_pruned_info());
   web_state_->OnNavigationItemsPruned(1);
   ASSERT_TRUE(observer->navigation_items_pruned_info());
   EXPECT_EQ(web_state_.get(),
@@ skipping 304 matching lines @@
   // Set |created_with_opener| to true and verify that HasOpener() returns true.
   WebState::CreateParams params_with_opener =
       WebState::CreateParams(GetBrowserState());
   params_with_opener.created_with_opener = true;
   std::unique_ptr<WebState> web_state_with_opener =
       WebState::Create(params_with_opener);
   EXPECT_TRUE(web_state_with_opener->HasOpener());
 }
 
 }  // namespace web