Add WebWidgetTestProxy.

components/test_runner/web_test_interfaces.cc

Index: components/test_runner/web_test_interfaces.cc
diff --git a/components/test_runner/web_test_interfaces.cc b/components/test_runner/web_test_interfaces.cc
index fa9b59b15df703dcc8ea346f844c42e03f099b97..08b595abca890ce07e4cf420045864d3d546e2c8 100644
--- a/components/test_runner/web_test_interfaces.cc
+++ b/components/test_runner/web_test_interfaces.cc
@@ -18,6 +18,7 @@
 #include "components/test_runner/web_view_test_client.h"
 #include "components/test_runner/web_view_test_proxy.h"
 #include "components/test_runner/web_widget_test_client.h"
+#include "components/test_runner/web_widget_test_proxy.h"
 
 using namespace blink;
 
@@ -105,9 +106,9 @@ std::unique_ptr<WebViewTestClient> WebTestInterfaces::CreateWebViewTestClient(
 
 std::unique_ptr<WebWidgetTestClient>
 WebTestInterfaces::CreateWebWidgetTestClient(
-    WebViewTestProxyBase* web_view_test_proxy_base) {
+    WebWidgetTestProxyBase* web_widget_test_proxy_base) {
   return base::WrapUnique(new WebWidgetTestClient(interfaces_->GetTestRunner(),
-                                                  web_view_test_proxy_base));
+                                                  web_widget_test_proxy_base));
 }
 
 std::vector<blink::WebView*> WebTestInterfaces::GetWindowList() {