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

chrome/browser/ui/browser_tab_strip_model_delegate.h

Index: chrome/browser/ui/browser_tab_strip_model_delegate.h
diff --git a/chrome/browser/ui/browser_tab_strip_model_delegate.h b/chrome/browser/ui/browser_tab_strip_model_delegate.h
index 405c01f5ef7b90849e348348bea2ce05abb2228b..798ce980e79cb6b0eaa7c1167f7e4e840f2e2e77 100644
--- a/chrome/browser/ui/browser_tab_strip_model_delegate.h
+++ b/chrome/browser/ui/browser_tab_strip_model_delegate.h
@@ -9,6 +9,8 @@
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
 
+class GURL;
+
 namespace chrome {
 
 class BrowserTabStripModelDelegate : public TabStripModelDelegate {
@@ -18,7 +20,9 @@ class BrowserTabStripModelDelegate : public TabStripModelDelegate {
 
  private:
   // Overridden from TabStripModelDelegate:
-  virtual void AddBlankTabAt(int index, bool foreground) OVERRIDE;
+  virtual void AddURLTabAt(const GURL& url,
+                           int index,
+                           bool foreground) OVERRIDE;
   virtual Browser* CreateNewStripWithContents(
       const std::vector<NewStripContents>& contentses,
       const gfx::Rect& window_bounds,