Add an identity (id) to system drag & drop.

webkit/glue/webview_impl.h

 // Copyright (c) 2006-2008 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 WEBKIT_GLUE_WEBVIEW_IMPL_H__
 #define WEBKIT_GLUE_WEBVIEW_IMPL_H__
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 82 matching lines @@
   virtual void DragSourceMovedTo(
       int client_x, int client_y, int screen_x, int screen_y);
   virtual void DragSourceSystemDragEnded();
   virtual bool DragTargetDragEnter(const WebDropData& drop_data,
       int client_x, int client_y, int screen_x, int screen_y);
   virtual bool DragTargetDragOver(
       int client_x, int client_y, int screen_x, int screen_y);
   virtual void DragTargetDragLeave();
   virtual void DragTargetDrop(
       int client_x, int client_y, int screen_x, int screen_y);
+  virtual int32 GetDragIdentity();
   virtual void AutofillSuggestionsForNode(
       int64 node_id,
       const std::vector<std::wstring>& suggestions,
       int default_suggestion_index);
 
   // WebViewImpl
 
   const gfx::Size& size() const { return size_; }
 
   const gfx::Point& last_mouse_down_point() const {
@@ skipping 173 matching lines @@
   // associated WM_CHAR event if the keydown was handled. We emulate
   // this behavior by setting this flag if the keyDown was handled.
   bool suppress_next_keypress_event_;
 
   // The disposition for how this webview is to be initially shown.
   WindowOpenDisposition window_open_disposition_;
 
   // Represents whether or not this object should process incoming IME events.
   bool ime_accept_events_;
 
+  // True while dispatching system drag and drop events to drag/drop targets
+  // within this WebView.
+  bool drag_target_dispatch_;
+
+  // Valid when drag_target_dispatch_ is true; the identity of the drag data
+  // copied from the WebDropData object sent from the browser process.
+  int32 drag_identity_;
+
   // The autocomplete popup.  Kept around and reused every-time new suggestions
   // should be shown.
   RefPtr<WebCore::PopupContainer> autocomplete_popup_;
 
   // Whether the autocomplete popup is currently showing.
   bool autocomplete_popup_showing_;
 
   // The autocomplete client.
   scoped_ptr<AutocompletePopupMenuClient> autocomplete_popup_client_;
 
   // HACK: current_input_event is for ChromeClientImpl::show(), until we can fix
   // WebKit to pass enough information up into ChromeClient::show() so we can
   // decide if the window.open event was caused by a middle-mouse click
 public:
   static const WebInputEvent* current_input_event() {
     return g_current_input_event;
   }
 private:
   static const WebInputEvent* g_current_input_event;
 
   DISALLOW_EVIL_CONSTRUCTORS(WebViewImpl);
 };
 
 #endif  // WEBKIT_GLUE_WEBVIEW_IMPL_H__