Drag-and-drop: Target drag messages to specific RenderWidgets.

content/browser/web_contents/web_contents_view_mus.cc

Index: content/browser/web_contents/web_contents_view_mus.cc
diff --git a/content/browser/web_contents/web_contents_view_mus.cc b/content/browser/web_contents/web_contents_view_mus.cc
index b0049be2424b3a9422f7516b7e8e790ad415af78..c37a98ba6a5d1bcdcba6557c7b371309a4be3c9d 100644
--- a/content/browser/web_contents/web_contents_view_mus.cc
+++ b/content/browser/web_contents/web_contents_view_mus.cc
@@ -207,7 +207,8 @@ void WebContentsViewMus::StartDragging(const DropData& drop_data,
                                        WebDragOperationsMask ops,
                                        const gfx::ImageSkia& image,
                                        const gfx::Vector2d& image_offset,
-                                       const DragEventSourceInfo& event_info) {
+                                       const DragEventSourceInfo& event_info,
+                                       RenderWidgetHost* source_rwh) {
   // TODO(fsamuel): Implement drag and drop.
 }