Fix dragging supported files to tab strip.

chrome/browser/ui/views/tabs/browser_tab_strip_controller.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_VIEWS_TABS_BROWSER_TAB_STRIP_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_BROWSER_TAB_STRIP_CONTROLLER_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_change_registrar.h"
@@ skipping 56 matching lines @@
   virtual void PerformDrop(bool drop_before,
                            int index,
                            const GURL& url) OVERRIDE;
   virtual bool IsCompatibleWith(TabStrip* other) const OVERRIDE;
   virtual void CreateNewTab() OVERRIDE;
   virtual void CreateNewTabWithLocation(const base::string16& loc) OVERRIDE;
   virtual bool IsIncognito() OVERRIDE;
   virtual void LayoutTypeMaybeChanged() OVERRIDE;
   virtual void OnStartedDraggingTabs() OVERRIDE;
   virtual void OnStoppedDraggingTabs() OVERRIDE;
+  virtual void CheckFileSupported(const GURL& url) OVERRIDE;
 
   // TabStripModelObserver implementation:
   virtual void TabInsertedAt(content::WebContents* contents,
                              int model_index,
                              bool is_active) OVERRIDE;
   virtual void TabDetachedAt(content::WebContents* contents,
                              int model_index) OVERRIDE;
   virtual void TabSelectionChanged(
       TabStripModel* tab_strip_model,
       const ui::ListSelectionModel& old_model) OVERRIDE;
@@ skipping 45 matching lines @@
   void StopHighlightTabsForCommand(
       TabStripModel::ContextMenuCommand command_id,
       Tab* tab);
 
   // Adds a tab.
   void AddTab(content::WebContents* contents, int index, bool is_active);
 
   // Resets the tabstrips layout type from prefs.
   void UpdateLayoutType();
 
+  // Notifies the tabstrip whether |url| is supported once a MIME type request
+  // has completed.
+  void OnFindURLMimeTypeCompleted(GURL url, const std::string& mime_type);
+
   TabStripModel* model_;
 
   TabStrip* tabstrip_;
 
   // Non-owning pointer to the browser which is using this controller.
   Browser* browser_;
 
   // If non-NULL it means we're showing a menu for the tab.
   scoped_ptr<TabContextMenuContents> context_menu_contents_;
 
   // Helper for performing tab selection as a result of dragging over a tab.
   HoverTabSelector hover_tab_selector_;
 
   // Forces the tabs to use the regular (non-immersive) style and the
   // top-of-window views to be revealed when the user is dragging |tabstrip|'s
   // tabs.
   scoped_ptr<ImmersiveRevealedLock> immersive_reveal_lock_;
 
   PrefChangeRegistrar local_pref_registrar_;
 
+  base::WeakPtrFactory<BrowserTabStripController> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserTabStripController);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_BROWSER_TAB_STRIP_CONTROLLER_H_