linux-aura: Restore middle-click on new-tab button behaviour.

chrome/browser/ui/tabs/test_tab_strip_model_delegate.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_TABS_TEST_TAB_STRIP_MODEL_DELEGATE_H_
 #define CHROME_BROWSER_UI_TABS_TEST_TAB_STRIP_MODEL_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
 
 // Mock TabStripModelDelegate.
 class TestTabStripModelDelegate : public TabStripModelDelegate {
  public:
   TestTabStripModelDelegate();
   virtual ~TestTabStripModelDelegate();
 
   // Overridden from TabStripModelDelegate:
   virtual void AddBlankTabAt(int index, bool foreground) OVERRIDE;
+  virtual void AddURLTabAt(const GURL& url, int index, bool foregroud) OVERRIDE;

[sky, 2013/11/15 20:57:09]

Can you combine AddBlankTabAt and AddURLTabAt? Maybe an empty url could be
treated as blank.

[sadrul, 2013/11/15 21:46:55]

Done. I combined these two only in TabStripModelDelegate(). I introduced a
chrome::AddURLTabAt(), which chrome::AddBlankTabAt() uses. I will have a
follow-up patch to remove chrome::AddBlankTabAt() and replace the callsites to
use AddURLTabAt() instead. That should be a fairly straight-forward mechanical
change.

   virtual Browser* CreateNewStripWithContents(
       const std::vector<NewStripContents>& contentses,
       const gfx::Rect& window_bounds,
       const DockInfo& dock_info,
       bool maximize) OVERRIDE;
   virtual void WillAddWebContents(content::WebContents* contents) OVERRIDE;
   virtual int GetDragActions() const OVERRIDE;
   virtual bool CanDuplicateContentsAt(int index) OVERRIDE;
   virtual void DuplicateContentsAt(int index) OVERRIDE;
   virtual void CloseFrameAfterDragSession() OVERRIDE;
   virtual void CreateHistoricalTab(content::WebContents* contents) OVERRIDE;
   virtual bool RunUnloadListenerBeforeClosing(
       content::WebContents* contents) OVERRIDE;
   virtual RestoreTabType GetRestoreTabType() OVERRIDE;
   virtual void RestoreTab() OVERRIDE;
   virtual bool CanBookmarkAllTabs() const OVERRIDE;
   virtual void BookmarkAllTabs() OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestTabStripModelDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_TABS_TEST_TAB_STRIP_MODEL_DELEGATE_H_