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

chrome/browser/ui/browser_tab_strip_model_delegate.cc

 // 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.
 
 #include "chrome/browser/ui/browser_tab_strip_model_delegate.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/tab_restore_service.h"
@@ skipping 25 matching lines @@
 BrowserTabStripModelDelegate::~BrowserTabStripModelDelegate() {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserTabStripModelDelegate, TabStripModelDelegate implementation:
 
 void BrowserTabStripModelDelegate::AddBlankTabAt(int index, bool foreground) {
   chrome::AddBlankTabAt(browser_, index, foreground);
 }
 
+void BrowserTabStripModelDelegate::AddURLTabAt(const GURL& url,
+                                               int index,
+                                               bool foreground) {
+  NavigateParams params(browser_, url, content::PAGE_TRANSITION_TYPED);
+  params.disposition = foreground ? NEW_FOREGROUND_TAB : NEW_BACKGROUND_TAB;
+  params.tabstrip_index = index;
+  Navigate(&params);
+}
+
 Browser* BrowserTabStripModelDelegate::CreateNewStripWithContents(
     const std::vector<NewStripContents>& contentses,
     const gfx::Rect& window_bounds,
     const DockInfo& dock_info,
     bool maximize) {
   DCHECK(browser_->CanSupportWindowFeature(Browser::FEATURE_TABSTRIP));
 
   gfx::Rect new_window_bounds = window_bounds;
   if (dock_info.GetNewWindowBounds(&new_window_bounds, &maximize))
     dock_info.AdjustOtherWindowBounds();
@@ skipping 99 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserTabStripModelDelegate, private:
 
 void BrowserTabStripModelDelegate::CloseFrame() {
   browser_->window()->Close();
 }
 
 }  // namespace chrome