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

chrome/browser/tab_contents/web_drag_source.cc

 // 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.
 
 #if defined(OS_WIN)
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlmisc.h>
 #endif
 
 #include "chrome/browser/tab_contents/web_drag_source.h"
 
 #include "chrome/browser/renderer_host/render_view_host.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/notification_type.h"
 #include "chrome/common/notification_service.h"
 
+using WebKit::WebDragOperationNone;
+using WebKit::WebDragOperationCopy;
+
 namespace {
 
 static void GetCursorPositions(gfx::NativeWindow wnd, gfx::Point* client,
                                gfx::Point* screen) {
 #if defined(OS_WIN)
   POINT cursor_pos;
   GetCursorPos(&cursor_pos);
   screen->SetPoint(cursor_pos.x, cursor_pos.y);
   ScreenToClient(wnd, &cursor_pos);
   client->SetPoint(cursor_pos.x, cursor_pos.y);
@@ skipping 18 matching lines @@
                  Source<TabContents>(tab_contents));
 }
 
 void WebDragSource::OnDragSourceCancel() {
   if (!render_view_host_)
     return;
 
   gfx::Point client;
   gfx::Point screen;
   GetCursorPositions(source_wnd_, &client, &screen);
-  render_view_host_->DragSourceCancelledAt(client.x(), client.y(),
-                                           screen.x(), screen.y());
+  render_view_host_->DragSourceEndedAt(client.x(), client.y(),
+                                       screen.x(), screen.y(),
+                                       WebDragOperationNone);
 }
 
 void WebDragSource::OnDragSourceDrop() {
   if (!render_view_host_)
     return;
 
   gfx::Point client;
   gfx::Point screen;
   GetCursorPositions(source_wnd_, &client, &screen);
   render_view_host_->DragSourceEndedAt(client.x(), client.y(),
-                                       screen.x(), screen.y());
+                                       screen.x(), screen.y(),
+                                       WebDragOperationCopy);
+  // TODO(jpa): This needs to be fixed to send the actual drag operation.
 }
 
 void WebDragSource::OnDragSourceMove() {
   if (!render_view_host_)
     return;
 
   gfx::Point client;
   gfx::Point screen;
   GetCursorPositions(source_wnd_, &client, &screen);
   render_view_host_->DragSourceMovedTo(client.x(), client.y(),
                                        screen.x(), screen.y());
 }
 
 void WebDragSource::Observe(NotificationType type,
     const NotificationSource& source, const NotificationDetails& details) {
   if (NotificationType::TAB_CONTENTS_SWAPPED == type) {
     // When the tab contents get swapped, our render view host goes away.
     // That's OK, we can continue the drag, we just can't send messages back to
     // our drag source.
     render_view_host_ = NULL;
   } else if (NotificationType::TAB_CONTENTS_DISCONNECTED) {
     NOTREACHED();
   }
 }