Extract WebWidgetTestClient out of WebTestProxyBase and WebViewTestClient.

components/test_runner/web_test_proxy.cc

Index: components/test_runner/web_test_proxy.cc
diff --git a/components/test_runner/web_test_proxy.cc b/components/test_runner/web_test_proxy.cc
index 6e816d10c9fa3acaa9c3915511a366aa624b613a..8e4ad2046c503a1c514cf0f1b798c08c72cef7e5 100644
--- a/components/test_runner/web_test_proxy.cc
+++ b/components/test_runner/web_test_proxy.cc
@@ -56,15 +56,4 @@ void WebTestProxyBase::BindTo(blink::WebLocalFrame* frame) {
   view_test_runner_->Install(frame);
 }
 
-void WebTestProxyBase::GetScreenOrientationForTesting(
-    blink::WebScreenInfo& screen_info) {
-  MockScreenOrientationClient* mock_client =
-      test_interfaces_->GetTestRunner()->getMockScreenOrientationClient();
-  if (mock_client->IsDisabled())
-    return;
-  // Override screen orientation information with mock data.
-  screen_info.orientationType = mock_client->CurrentOrientationType();
-  screen_info.orientationAngle = mock_client->CurrentOrientationAngle();
-}
-
 }  // namespace test_runner