Forward mouse down node information to WebWidgetClient

Source/web/ChromeClientImpl.cpp

Index: Source/web/ChromeClientImpl.cpp
diff --git a/Source/web/ChromeClientImpl.cpp b/Source/web/ChromeClientImpl.cpp
index bfb4806685ed4401ed5d57bd63d07407fd239e1b..13341271e20ae77d624d9e7dbb2fec67370adc53 100644
--- a/Source/web/ChromeClientImpl.cpp
+++ b/Source/web/ChromeClientImpl.cpp
@@ -884,6 +884,12 @@ void ChromeClientImpl::showUnhandledTapUIIfNeeded(IntPoint tappedPositionInViewp
         m_webView->client()->showUnhandledTapUIIfNeeded(WebPoint(tappedPositionInViewport), WebNode(tappedNode), pageChanged);
 }
 
+void ChromeClientImpl::onMouseDown(Node* mouseDownNode)
+{
+    if (m_webView->client())
+        m_webView->client()->onMouseDown(WebNode(mouseDownNode));
+}
+
 void ChromeClientImpl::handleKeyboardEventOnTextField(HTMLInputElement& inputElement, KeyboardEvent& event)
 {
     WebLocalFrameImpl* webframe = WebLocalFrameImpl::fromFrame(inputElement.document().frame());