(blink) Propagate scrolling/marginwidth/marginheight property values to child frame.

Source/web/FrameLoaderClientImpl.cpp

Index: Source/web/FrameLoaderClientImpl.cpp
diff --git a/Source/web/FrameLoaderClientImpl.cpp b/Source/web/FrameLoaderClientImpl.cpp
index 0e82d6c77fc15e7d285dc4ff87773f9a1917b6a1..17c4729c2f4a79b538c7e0f58977e4669332367c 100644
--- a/Source/web/FrameLoaderClientImpl.cpp
+++ b/Source/web/FrameLoaderClientImpl.cpp
@@ -187,6 +187,38 @@ void FrameLoaderClientImpl::didChangeScrollOffset()
         webview->devToolsEmulator()->viewportChanged();
 }
 
+void FrameLoaderClientImpl::didChangeScrollingMode(Frame* childFrame, ScrollbarMode scrollingMode)
+{
+    if (!m_webFrame->client())
+        return;
+
+    WebFrameOwnerProperties::ScrollingMode webScrollingMode = WebFrameOwnerProperties::ScrollingModeAuto;
+    switch (scrollingMode) {
+    case ScrollbarAuto:
+        webScrollingMode = WebFrameOwnerProperties::ScrollingModeAuto;
+        break;
+    case ScrollbarAlwaysOn:
+        webScrollingMode = WebFrameOwnerProperties::ScrollingModeAlwaysOn;
+        break;
+    case ScrollbarAlwaysOff:
+        webScrollingMode = WebFrameOwnerProperties::ScrollingModeAlwaysOff;
+        break;
+    }
+    m_webFrame->client()->didChangeScrollingMode(WebFrame::fromFrame(childFrame), webScrollingMode);
+}
+
+void FrameLoaderClientImpl::didChangeMarginWidth(Frame* childFrame, int newMarginWidth)
+{
+    if (m_webFrame->client())
+        m_webFrame->client()->didChangeMarginWidth(WebFrame::fromFrame(childFrame), newMarginWidth);
+}
+
+void FrameLoaderClientImpl::didChangeMarginHeight(Frame* childFrame, int newMarginHeight)
+{
+    if (m_webFrame->client())
+        m_webFrame->client()->didChangeMarginHeight(WebFrame::fromFrame(childFrame), newMarginHeight);
+}
+
 void FrameLoaderClientImpl::didUpdateCurrentHistoryItem()
 {
     if (m_webFrame->client())