Replaced webPageOrderedClose with WebStateDelegate API.

ios/web/public/test/fakes/test_web_state_delegate.mm

 // Copyright 2017 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/public/test/fakes/test_web_state_delegate.h"
 
 #include "base/memory/ptr_util.h"
 #import "ios/web/web_state/web_state_impl.h"
 
 namespace web {
@@ skipping 46 matching lines @@
 
   std::unique_ptr<WebStateImpl> child(
       base::MakeUnique<WebStateImpl>(source->GetBrowserState()));
   child->GetNavigationManagerImpl().InitializeSession(YES /*opened_by_dom*/);
   child->SetWebUsageEnabled(true);
 
   child_windows_.push_back(std::move(child));
   return child_windows_.back().get();
 }
 
+void TestWebStateDelegate::CloseWebState(WebState* source) {
+  last_close_web_state_request_ = base::MakeUnique<TestCloseWebStateRequest>();
+  last_close_web_state_request_->web_state = source;
+
+  // Remove WebState from |child_windows_|.
+  for (size_t i = 0; i < child_windows_.size(); i++) {
+    if (child_windows_[i].get() == source) {
+      child_windows_.erase(child_windows_.begin() + i);

[rohitrao (ping after 24h), 2017/03/13 12:30:02]

If the WebState is owned by child_windows_, we destroy it here.

[Eugene But (OOO till 7-30), 2017/03/14 01:20:24]

Good catch. Fixed by having |closed_child_windows_| vector.

+      break;
+    }
+  }
+}
+
 WebState* TestWebStateDelegate::OpenURLFromWebState(
     WebState* web_state,
     const WebState::OpenURLParams& params) {
   last_open_url_request_ = base::MakeUnique<TestOpenURLRequest>();
   last_open_url_request_->web_state = web_state;
   last_open_url_request_->params = params;
   return nullptr;
 }
 
 JavaScriptDialogPresenter* TestWebStateDelegate::GetJavaScriptDialogPresenter(
@@ skipping 28 matching lines @@
     const AuthCallback& callback) {
   last_authentication_request_ = base::MakeUnique<TestAuthenticationRequest>();
   last_authentication_request_->web_state = source;
   last_authentication_request_->protection_space.reset(
       [protection_space retain]);
   last_authentication_request_->credential.reset([credential retain]);
   last_authentication_request_->auth_callback = callback;
 }
 
 }  // namespace web