compositor-worker: Add CompositorProxyClient worker client of CompositorWorker.

third_party/WebKit/Source/web/WebViewFrameWidget.cpp

Index: third_party/WebKit/Source/web/WebViewFrameWidget.cpp
diff --git a/third_party/WebKit/Source/web/WebViewFrameWidget.cpp b/third_party/WebKit/Source/web/WebViewFrameWidget.cpp
index 0ed5769c41589233b8ee0aae4c00fe23446254e3..e75d9c8006404980732ff1ec4d0ca3b24b922884 100644
--- a/third_party/WebKit/Source/web/WebViewFrameWidget.cpp
+++ b/third_party/WebKit/Source/web/WebViewFrameWidget.cpp
@@ -260,4 +260,9 @@ void WebViewFrameWidget::scheduleAnimation()
     m_webView->scheduleAnimation();
 }
 
+CompositorProxyClient* WebViewFrameWidget::createCompositorProxyClient()
+{
+    return m_webView->createCompositorProxyClient();
+}
+
 } // namespace blink