Plumb the DragOperation through all the layers between the platform DnD code ...

chrome/browser/gtk/tab_contents_drag_source.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/gtk/tab_contents_drag_source.h"
 
 #include "app/gtk_dnd_util.h"
 #include "base/mime_util.h"
 #include "chrome/browser/renderer_host/render_view_host_delegate.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/tab_contents/tab_contents_view.h"
 #include "chrome/common/gtk_util.h"
 #include "webkit/glue/webdropdata.h"
 
+using WebKit::WebDragOperation;
+using WebKit::WebDragOperationNone;
+
 TabContentsDragSource::TabContentsDragSource(
     TabContentsView* tab_contents_view)
     : tab_contents_view_(tab_contents_view),
       drag_failed_(false),
       drag_widget_(NULL) {
   drag_widget_ = gtk_invisible_new();
   g_signal_connect(drag_widget_, "drag-failed",
                    G_CALLBACK(OnDragFailedThunk), this);
   g_signal_connect(drag_widget_, "drag-end", G_CALLBACK(OnDragEndThunk), this);
   g_signal_connect(drag_widget_, "drag-data-get",
@@ skipping 138 matching lines @@
   }
 }
 
 gboolean TabContentsDragSource::OnDragFailed() {
   drag_failed_ = true;
 
   gfx::Point root = gtk_util::ScreenPoint(GetContentNativeView());
   gfx::Point client = gtk_util::ClientPoint(GetContentNativeView());
 
   if (tab_contents()->render_view_host()) {
-    tab_contents()->render_view_host()->DragSourceCancelledAt(
-        client.x(), client.y(), root.x(), root.y());
+    tab_contents()->render_view_host()->DragSourceEndedAt(
+        client.x(), client.y(), root.x(), root.y(),
+        WebDragOperationNone);
   }
 
   // Let the native failure animation run.
   return FALSE;
 }
 
-void TabContentsDragSource::OnDragEnd() {
+void TabContentsDragSource::OnDragEnd(WebDragOperation operation) {
   MessageLoopForUI::current()->RemoveObserver(this);
 
   if (!drag_failed_) {
     gfx::Point root = gtk_util::ScreenPoint(GetContentNativeView());
     gfx::Point client = gtk_util::ClientPoint(GetContentNativeView());
 
     if (tab_contents()->render_view_host()) {
       tab_contents()->render_view_host()->DragSourceEndedAt(
-          client.x(), client.y(), root.x(), root.y());
+          client.x(), client.y(), root.x(), root.y(), operation);
     }
   }
 
   if (tab_contents()->render_view_host())
     tab_contents()->render_view_host()->DragSourceSystemDragEnded();
 
   drop_data_.reset();
 }
 
 gfx::NativeView TabContentsDragSource::GetContentNativeView() const {
   return tab_contents_view_->GetContentNativeView();
 }