Drag-and-drop across OOPIFs.

third_party/WebKit/Source/web/WebFrameWidgetBase.h

Index: third_party/WebKit/Source/web/WebFrameWidgetBase.h
diff --git a/third_party/WebKit/Source/web/WebFrameWidgetBase.h b/third_party/WebKit/Source/web/WebFrameWidgetBase.h
index ccd3ebb6016f7051a924bf0b3aef8b5167069016..cea53c53b22504f95039830aad2fdc0180701f17 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetBase.h
+++ b/third_party/WebKit/Source/web/WebFrameWidgetBase.h
@@ -16,6 +16,7 @@ class CompositorAnimationTimeline;
 class CompositorProxyClient;
 class DragController;
 class GraphicsLayer;
+class WebImage;
 class WebLayer;
 class WebLocalFrameImpl;
 class WebViewImpl;
@@ -64,6 +65,15 @@ class WebFrameWidgetBase : public WebFrameWidget {
                          WebDragOperation) override;
   void dragSourceSystemDragEnded() override;
 
+  // Called when a drag-n-drop operation should begin.
+  void startDragging(WebReferrerPolicy,
+                     const WebDragData&,
+                     WebDragOperationsMask,
+                     const WebImage& dragImage,
+                     const WebPoint& dragImageOffset);
+
+  bool doingDragAndDrop() { return m_doingDragAndDrop; }
+
  protected:
   enum DragAction { DragEnter, DragOver };