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

components/plugins/renderer/webview_plugin.h

Index: components/plugins/renderer/webview_plugin.h
diff --git a/components/plugins/renderer/webview_plugin.h b/components/plugins/renderer/webview_plugin.h
index 086fa6db3a1a793519d762c32f7d36376d99a2fb..fdb1cf9cbbeeb6915cffa86b053ed20b3e896ef2 100644
--- a/components/plugins/renderer/webview_plugin.h
+++ b/components/plugins/renderer/webview_plugin.h
@@ -114,11 +114,11 @@ class WebViewPlugin : public blink::WebPlugin,
   void setToolTipText(const blink::WebString&,
                       blink::WebTextDirection) override;
 
-  void startDragging(blink::WebLocalFrame* frame,
-                     const blink::WebDragData& drag_data,
-                     blink::WebDragOperationsMask mask,
-                     const blink::WebImage& image,
-                     const blink::WebPoint& point) override;
+  void startDragging(blink::WebReferrerPolicy,
+                     const blink::WebDragData&,
+                     blink::WebDragOperationsMask,
+                     const blink::WebImage&,
+                     const blink::WebPoint&) override;
 
   // TODO(ojan): Remove this override and have this class use a non-null
   // layerTreeView.