Add a flag that lets the webstore show a different UI on app install.

chrome/browser/ui/touch/tabs/touch_tab_strip.cc

 // Copyright (c) 2011 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/touch/tabs/touch_tab_strip.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "chrome/browser/ui/touch/tabs/touch_tab.h"
@@ skipping 41 matching lines @@
 bool TouchTabStrip::IsPositionInWindowCaption(const gfx::Point& point) {
   // The entire tabstrip is mine. No part of it belongs to the window caption.
   return false;
 }
 
 void TouchTabStrip::SetBackgroundOffset(const gfx::Point& offset) {
   for (int i = 0; i < tab_count(); ++i)
     GetTabAtTabDataIndex(i)->set_background_offset(offset);
 }
 
+views::View* TouchTabStrip::GetNewTabButton() {
+  return NULL;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // TouchTabStrip, BaseTabStrip implementation:
 
 void TouchTabStrip::PrepareForCloseAt(int model_index) {
   if (!in_tab_close_ && IsAnimating()) {
     // Cancel any current animations. We do this as remove uses the current
     // ideal bounds and we need to know ideal bounds is in a good state.
     StopAnimating(true);
   }
 
@@ skipping 288 matching lines @@
   last_tapped_view_ = view;
   return ui::TOUCH_STATUS_UNKNOWN;
 }
 
 void TouchTabStrip::ViewHierarchyChanged(bool is_add,
                                          View* parent,
                                          View* child) {
   if (!is_add && last_tapped_view_ == child)
     last_tapped_view_ = NULL;
 }