ntp4: default to 18 apps per page for new installs

chrome/browser/extensions/test_extension_prefs.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_PREFS_H_
 #define CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_PREFS_H_
 #pragma once
 
 #include <string>
 
@@ skipping 22 matching lines @@
   const FilePath& temp_dir() const { return temp_dir_.path(); }
 
   // This will cause the ExtensionPrefs to be deleted and recreated, based on
   // any existing backing file we had previously created.
   void RecreateExtensionPrefs();
 
   // Creates a new Extension with the given name in our temp dir, adds it to
   // our ExtensionPrefs, and returns it.
   scoped_refptr<Extension> AddExtension(std::string name);
 
+  // As above, but the extension is an app.
+  scoped_refptr<Extension> AddApp(std::string name);
+
   // Similar to AddExtension, but takes a dictionary with manifest values.
   scoped_refptr<Extension> AddExtensionWithManifest(
       const base::DictionaryValue& manifest, Extension::Location location);
 
   // Similar to AddExtension, but takes a dictionary with manifest values
   // and extension flags.
   scoped_refptr<Extension> AddExtensionWithManifestAndFlags(
       const base::DictionaryValue& manifest,
       Extension::Location location,
       int extra_flags);
@@ skipping 11 matching lines @@
   FilePath extensions_dir_;
   scoped_ptr<PrefService> pref_service_;
   scoped_ptr<ExtensionPrefs> prefs_;
   scoped_ptr<ExtensionPrefValueMap> extension_pref_value_map_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestExtensionPrefs);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_PREFS_H_