Tests for dragging between two frames (potentially cross-site from main frame).

third_party/WebKit/Source/web/WebFrameWidgetBase.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebFrameWidgetBase_h
 #define WebFrameWidgetBase_h
 
 #include "core/clipboard/DataObject.h"
 #include "public/platform/WebDragData.h"
 #include "public/web/WebFrameWidget.h"
@@ skipping 70 matching lines @@
   // updating a drag over a target. If we're starting a drag, |isEntering|
   // should be true.
   WebDragOperation dragTargetDragEnterOrOver(const WebPoint& pointInViewport,
                                              const WebPoint& screenPoint,
                                              DragAction,
                                              int modifiers);
 
   // Helper function to call VisualViewport::viewportToRootFrame().
   WebPoint viewportToRootFrame(const WebPoint& pointInViewport) const;
 
+  // Returns the local root as a LocalFrame*.
+  LocalFrame* localFrameRoot() const;
+

[Łukasz Anforowicz, 2016/11/30 16:47:38]

Ooops.  Not sure how it got here.  I'll remove in the next patchset.

   WebViewImpl* view() const;
 
   // Returns the page object associated with this widget. This may be null when
   // the page is shutting down, but will be valid at all other times.
   Page* page() const;
 
   // A copy of the web drop data object we received from the browser.
   Persistent<DataObject> m_currentDragData;
 
   bool m_doingDragAndDrop = false;
 
   // The available drag operations (copy, move link...) allowed by the source.
   WebDragOperation m_operationsAllowed = WebDragOperationNone;
 
   // The current drag operation as negotiated by the source and destination.
   // When not equal to DragOperationNone, the drag data can be dropped onto the
   // current drop target in this WebView (the drop target can accept the drop).
   WebDragOperation m_dragOperation = WebDragOperationNone;
 };
 
 DEFINE_TYPE_CASTS(WebFrameWidgetBase, WebFrameWidget, widget, true, true);
 
 }  // namespace blink
 
 #endif