Provide an override for Webview drop effect....

webkit/glue/webview_impl.h

Index: webkit/glue/webview_impl.h
===================================================================
--- webkit/glue/webview_impl.h	(revision 14025)
+++ webkit/glue/webview_impl.h	(working copy)
@@ -115,6 +115,7 @@
       const WebKit::WebPoint& client_point,
       const WebKit::WebPoint& screen_point);
   virtual int32 GetDragIdentity();
+  virtual bool SetDropEffect(bool accept);
   virtual void AutofillSuggestionsForNode(
       int64 node_id,
       const std::vector<std::wstring>& suggestions,
@@ -324,6 +325,16 @@
   // copied from the WebDropData object sent from the browser process.
   int32 drag_identity_;
 
+  // Valid when drag_target_dispatch_ is true.  Used to override the default
+  // browser drop effect with the effects "copy" or "none".
+  enum DragTargetDropEffect {
+    DROP_EFFECT_DEFAULT = 0, DROP_EFFECT_COPY, DROP_EFFECT_NONE

[tony, 2009/04/21 18:26:28]

Nit: one value per line (that's what we do everywhere else we have an enum).

+  } drop_effect_;
+
+  // When true, the drag data can be dropped onto the current drop target in
+  // this WebView (the drop target can accept the drop).
+  bool drop_accept_;
+
   // The autocomplete popup.  Kept around and reused every-time new suggestions
   // should be shown.
   RefPtr<WebCore::PopupContainer> autocomplete_popup_;