Add WebWidgetTestProxy.

components/test_runner/web_view_test_proxy.cc

 // 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.
 
 #include "components/test_runner/web_view_test_proxy.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "components/test_runner/accessibility_controller.h"
 #include "components/test_runner/event_sender.h"
 #include "components/test_runner/mock_screen_orientation_client.h"
 #include "components/test_runner/test_interfaces.h"
 #include "components/test_runner/test_runner.h"
 #include "components/test_runner/test_runner_for_specific_view.h"
 #include "components/test_runner/text_input_controller.h"
 #include "components/test_runner/web_test_delegate.h"
 #include "components/test_runner/web_test_interfaces.h"
+#include "components/test_runner/web_widget_test_proxy.h"
 
 namespace test_runner {
 
 WebViewTestProxyBase::WebViewTestProxyBase()
     : test_interfaces_(nullptr),
       delegate_(nullptr),
       web_view_(nullptr),
-      web_widget_(nullptr),
       accessibility_controller_(new AccessibilityController(this)),
       event_sender_(new EventSender(this)),
       text_input_controller_(new TextInputController(this)),
       view_test_runner_(new TestRunnerForSpecificView(this)) {}
 
 WebViewTestProxyBase::~WebViewTestProxyBase() {
   test_interfaces_->WindowClosed(this);
 }
 
 void WebViewTestProxyBase::SetInterfaces(WebTestInterfaces* interfaces) {
   test_interfaces_ = interfaces->GetTestInterfaces();
   test_interfaces_->WindowOpened(this);
 }
 
 void WebViewTestProxyBase::Reset() {
   accessibility_controller_->Reset();
   event_sender_->Reset();
   // text_input_controller_ doesn't have any state to reset.
   view_test_runner_->Reset();
 }
 
 void WebViewTestProxyBase::BindTo(blink::WebLocalFrame* frame) {
   accessibility_controller_->Install(frame);
   event_sender_->Install(frame);
   text_input_controller_->Install(frame);
   view_test_runner_->Install(frame);
 }
 
 }  // namespace test_runner