Add WebWidgetTestProxy.

components/test_runner/web_widget_test_proxy.cc

Index: components/test_runner/web_widget_test_proxy.cc
diff --git a/components/test_runner/web_frame_test_proxy.cc b/components/test_runner/web_widget_test_proxy.cc
similarity index 54%
copy from components/test_runner/web_frame_test_proxy.cc
copy to components/test_runner/web_widget_test_proxy.cc
index bb00adea1a3431f767e4436a4582d89d8343d137..d3d4036d2ecd0499c83a3920a6ed6989336ca545 100644
--- a/components/test_runner/web_frame_test_proxy.cc
+++ b/components/test_runner/web_widget_test_proxy.cc
@@ -2,11 +2,12 @@
 // 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_frame_test_proxy.h"
+#include "components/test_runner/web_widget_test_proxy.h"
 
 namespace test_runner {
 
-WebFrameTestProxyBase::WebFrameTestProxyBase() : web_frame_(nullptr) {}
-WebFrameTestProxyBase::~WebFrameTestProxyBase() {}
+WebWidgetTestProxyBase::WebWidgetTestProxyBase() : web_widget_(nullptr) {}
+
+WebWidgetTestProxyBase::~WebWidgetTestProxyBase() {}
 
 }  // namespace test_runner