Sets a transparent background for out-of-process subframes.

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 2a60f158c8ef0c08b00595d22d4dea442d4549bd..86f9d4b36074d643be90fcbf7155d00028bb2097 100644
--- a/third_party/WebKit/Source/web/WebViewFrameWidget.cpp
+++ b/third_party/WebKit/Source/web/WebViewFrameWidget.cpp
@@ -265,6 +265,21 @@ void WebViewFrameWidget::setVisibilityState(WebPageVisibilityState visibilitySta
     return m_webView->setVisibilityState(visibilityState, isInitialState);
 }
 
+void WebViewFrameWidget::setIsTransparent(bool isTransparent)
+{
+    m_webView->setIsTransparent(isTransparent);
+}
+
+bool WebViewFrameWidget::isTransparent() const
+{
+    return m_webView->isTransparent();
+}
+
+void WebViewFrameWidget::setBaseBackgroundColor(WebColor color)
+{
+    m_webView->setBaseBackgroundColor(color);
+}
+
 void WebViewFrameWidget::scheduleAnimation()
 {
     m_webView->scheduleAnimation();