Implement WebContentsView::GetDropData for Mac; disable on Aura

content/browser/web_contents/web_drag_dest_win.h

Index: content/browser/web_contents/web_drag_dest_win.h
diff --git a/content/browser/web_contents/web_drag_dest_win.h b/content/browser/web_contents/web_drag_dest_win.h
index ffa53c797398ed599ebd22854b463beb818aa2a3..921a43d70fec0e4b216beab717a84010143a02c0 100644
--- a/content/browser/web_contents/web_drag_dest_win.h
+++ b/content/browser/web_contents/web_drag_dest_win.h
@@ -10,6 +10,7 @@
 #include "content/common/content_export.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "ui/base/dragdrop/drop_target.h"
+#include "webkit/glue/webdropdata.h"
 
 class InterstitialDropTarget;
 
@@ -36,6 +37,8 @@ class CONTENT_EXPORT WebDragDest : public ui::DropTarget {
   content::WebDragDestDelegate* delegate() const { return delegate_; }
   void set_delegate(content::WebDragDestDelegate* d) { delegate_ = d; }
 
+  WebDropData* current_drop_data() const { return drop_data_.get(); }
+
  protected:
   virtual DWORD OnDragEnter(IDataObject* data_object,
                             DWORD key_state,
@@ -75,6 +78,9 @@ class CONTENT_EXPORT WebDragDest : public ui::DropTarget {
   // A delegate that can receive drag information about drag events.
   content::WebDragDestDelegate* delegate_;
 
+  // The data for the current drag, or NULL if none is in progress.
+  scoped_ptr<WebDropData> drop_data_;
+
   DISALLOW_COPY_AND_ASSIGN(WebDragDest);
 };