Attempt 3 at a better touch tabstrip. There is still a bunch to do,

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

 // Copyright (c) 2011 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_TAB_STRIP_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_CONTROLLER_H_
 #pragma once
 
 class BaseTab;
 class GURL;
@@ skipping 16 matching lines @@
   // Returns the number of tabs in the model.
   virtual int GetCount() const = 0;
 
   // Returns true if |index| is a valid model index.
   virtual bool IsValidIndex(int index) const = 0;
 
   // Returns true if the tab at |index| is the active tab. The active tab is the
   // one whose content is shown.
   virtual bool IsActiveTab(int index) const = 0;
 
+  // Returns the index of the active tab.
+  virtual int GetActiveIndex() const = 0;
+
   // Returns true if the selected index is selected.
   virtual bool IsTabSelected(int index) const = 0;
 
   // Returns true if the selected index is pinned.
   virtual bool IsTabPinned(int index) const = 0;
 
   // Returns true if the selected index is closeable.
   virtual bool IsTabCloseable(int index) const = 0;
 
   // Returns true if the selected index is the new tab page.
@@ skipping 41 matching lines @@
 
   // Informs that an active tab is selected when already active (ie - clicked
   // when already active/foreground).
   virtual void ClickActiveTab(int index) = 0;
 
   // Returns true if the tab strip is in an incognito window.
   virtual bool IsIncognito() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_CONTROLLER_H_