Move TabStripModelDelegate off Browser into its own class.

chrome/browser/extensions/extension_install_ui_default.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/extensions/extension_install_ui_default.h"
 
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/theme_installed_infobar_delegate.h"
@@ skipping 106 matching lines @@
     ShowThemeInfoBar(previous_theme_id_, previous_using_native_theme_,
                      extension, profile_);
     return;
   }
 
   // Extensions aren't enabled by default in incognito so we confirm
   // the install in a normal window.
   Profile* current_profile = profile_->GetOriginalProfile();
   Browser* browser = browser::FindOrCreateTabbedBrowser(current_profile);
   if (browser->tab_count() == 0)
-    browser->AddBlankTab(true);
+    chrome::AddBlankTab(browser, true);
   browser->window()->Show();
 
   bool use_bubble_for_apps = false;
 
 #if defined(TOOLKIT_VIEWS)
   CommandLine* cmdline = CommandLine::ForCurrentProcess();
   use_bubble_for_apps = (use_app_installed_bubble_ ||
                          cmdline->HasSwitch(switches::kAppsNewInstallBubble));
 #endif
 
@@ skipping 115 matching lines @@
 #else
     NOTREACHED();
 #endif
   }
 }
 
 // static
 void ExtensionInstallUI::DisableFailureUIForTests() {
   disable_failure_ui_for_tests = true;
 }