Extract WebWidgetTestClient out of WebTestProxyBase and WebViewTestClient.

content/shell/renderer/layout_test/layout_test_content_renderer_client.cc

 // Copyright (c) 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 "content/shell/renderer/layout_test/layout_test_content_renderer_client.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "components/test_runner/mock_credential_manager_client.h"
@@ skipping 53 matching lines @@
   static bool first_test_runner = true;
   if (first_test_runner) {
     first_test_runner = false;
     interfaces->SetDelegate(test_runner);
   }
 
   proxy->set_delegate(test_runner);
   proxy->set_view_test_client(LayoutTestRenderThreadObserver::GetInstance()
                                   ->test_interfaces()
                                   ->CreateWebViewTestClient(proxy));
+  proxy->set_widget_test_client(LayoutTestRenderThreadObserver::GetInstance()
+                                    ->test_interfaces()
+                                    ->CreateWebWidgetTestClient(proxy));
   proxy->SetInterfaces(interfaces);
 }
 
 void WebFrameTestProxyCreated(RenderFrame* render_frame,
                               test_runner::WebFrameTestProxyBase* proxy) {
   test_runner::WebTestProxyBase* web_test_proxy_base =
       GetWebTestProxyBase(render_frame->GetRenderView());
   proxy->set_test_client(LayoutTestRenderThreadObserver::GetInstance()
                              ->test_interfaces()
                              ->CreateWebFrameTestClient(web_test_proxy_base));
@@ skipping 102 matching lines @@
 LayoutTestContentRendererClient::CreateMediaStreamRendererFactory() {
 #if defined(ENABLE_WEBRTC)
   return std::unique_ptr<MediaStreamRendererFactory>(
       new TestMediaStreamRendererFactory());
 #else
   return nullptr;
 #endif
 }
 
 }  // namespace content