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

chrome/browser/views/tab_contents/tab_contents_view_gtk.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/views/tab_contents/tab_contents_view_gtk.h"
 
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
 
 #include "base/string_util.h"
@@ skipping 142 matching lines @@
 
 gfx::NativeWindow TabContentsViewGtk::GetTopLevelNativeWindow() const {
   GtkWidget* window = gtk_widget_get_ancestor(GetNativeView(), GTK_TYPE_WINDOW);
   return window ? GTK_WINDOW(window) : NULL;
 }
 
 void TabContentsViewGtk::GetContainerBounds(gfx::Rect* out) const {
   GetBounds(out, false);
 }
 
-void TabContentsViewGtk::StartDragging(const WebDropData& drop_data) {
+void TabContentsViewGtk::StartDragging(const WebDropData& drop_data,
+                                       WebDragOperationsMask ops) {
   drag_source_->StartDragging(drop_data, &last_mouse_down_);
+  // TODO(snej): Make use of WebDragOperationsMask
 }
 
 void TabContentsViewGtk::OnContentsDestroy() {
   // TODO(brettw) this seems like maybe it can be moved into OnDestroy and this
   // function can be deleted? If you're adding more here, consider whether it
   // can be moved into OnDestroy which is a Windows message handler as the
   // window is being torn down.
 
   // We don't want to try to handle drag events from this point on.
   drag_source_.reset();
@@ skipping 40 matching lines @@
 
 void TabContentsViewGtk::StoreFocus() {
   NOTIMPLEMENTED();
 }
 
 void TabContentsViewGtk::RestoreFocus() {
   NOTIMPLEMENTED();
   SetInitialFocus();
 }
 
-void TabContentsViewGtk::UpdateDragCursor(bool is_drop_target) {
+void TabContentsViewGtk::UpdateDragCursor(WebDragOperation operation) {
   NOTIMPLEMENTED();
 }
 
 void TabContentsViewGtk::GotFocus() {
   tab_contents()->delegate()->TabContentsFocused(tab_contents());
 }
 
 void TabContentsViewGtk::TakeFocus(bool reverse) {
   // This is called when we the renderer asks us to take focus back (i.e., it
   // has iterated past the last focusable element on the page).
@@ skipping 73 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BlockedPopupContainerViewGtk);
 };
 
 // static
 BlockedPopupContainerView* BlockedPopupContainerView::Create(
     BlockedPopupContainer* container) {
   return new BlockedPopupContainerViewGtk;
 }