Drag-and-drop: Move startDrag out of WebView/RenderView.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

Index: third_party/WebKit/Source/web/ChromeClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.cpp b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
index 9a15330d50765bcedde5fba60c91fe238ad266b7..328e4a8b8b8ceafe74bb58a03a7bac3b470177b5 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -260,7 +260,14 @@ void ChromeClientImpl::startDragging(LocalFrame* frame,
                                      WebDragOperationsMask mask,
                                      const WebImage& dragImage,
                                      const WebPoint& dragImageOffset) {
-  m_webView->startDragging(frame, dragData, mask, dragImage, dragImageOffset);
+  WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(frame);
+  if (!webFrame->localRoot()->frameWidget() ||
+      !webFrame->localRoot()->frameWidget()->client()) {
+    return;
+  }
+  m_webView->m_doingDragAndDrop = true;
+  webFrame->localRoot()->frameWidget()->client()->startDragging(
+      webFrame, dragData, mask, dragImage, dragImageOffset);
 }
 
 bool ChromeClientImpl::acceptsLoadDrops() const {