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

chrome/browser/ui/tabs/test_tab_strip_model_delegate.h

Index: chrome/browser/ui/tabs/test_tab_strip_model_delegate.h
diff --git a/chrome/browser/ui/tabs/test_tab_strip_model_delegate.h b/chrome/browser/ui/tabs/test_tab_strip_model_delegate.h
index a47016812df6b7c611a2f5e848a7cc3805a5241c..aabfa0a3016c6566b16c439e40a5acb510d120fc 100644
--- a/chrome/browser/ui/tabs/test_tab_strip_model_delegate.h
+++ b/chrome/browser/ui/tabs/test_tab_strip_model_delegate.h
@@ -17,6 +17,7 @@ class TestTabStripModelDelegate : public TabStripModelDelegate {
 
   // 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,