Change the launcher to create new tabs instead of windows when

ash/launcher/launcher_view.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 "ash/launcher/launcher_view.h"
 
 #include "ash/launcher/launcher_button.h"
 #include "ash/launcher/launcher_delegate.h"
 #include "ash/launcher/launcher_model.h"
 #include "ash/launcher/tabbed_launcher_button.h"
@@ skipping 702 matching lines @@
     case TYPE_APP:
     case TYPE_APP_SHORTCUT:
       delegate_->ItemClicked(model_->items()[view_index]);
       break;
 
     case TYPE_APP_LIST:
       Shell::GetInstance()->ToggleAppList();
       break;
 
     case TYPE_BROWSER_SHORTCUT:
-      delegate_->CreateNewWindow();
+      delegate_->CreateNewTab();
       break;
   }
 }
 
 void LauncherView::ShowContextMenuForView(views::View* source,
                                           const gfx::Point& point) {
   int view_index = view_model_->GetIndexOfView(source);
   // May be -1 while in the process of animating closed.
   if (view_index == -1 || !delegate_)
     return;
@@ skipping 12 matching lines @@
   // code.
   if (launcher_menu_runner_->RunMenuAt(
           source->GetWidget(), NULL, gfx::Rect(point, gfx::Size()),
           views::MenuItemView::TOPLEFT, 0) == views::MenuRunner::MENU_DELETED)
     return;
 #endif
 }
 
 }  // namespace internal
 }  // namespace ash