Adds a webstorePrivate method for silently installing extensions.

chrome/browser/extensions/extension_browsertest.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_EXTENSION_BROWSERTEST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_
 #pragma once
 
 #include <string>
 
@@ skipping 25 matching lines @@
                                             bool incognito_enabled,
                                             bool fileaccess_enabled);
 
   // Loads extension and imitates that it is a component extension.
   bool LoadExtensionAsComponent(const FilePath& path);
 
   // Pack the extension in |dir_path| into a crx file and return its path.
   // Return an empty FilePath if there were errors.
   FilePath PackExtension(const FilePath& dir_path);
 
+  // Pack the extension in |dir_path| into a crx file at |crx_path|, using the
+  // key |pem_path|. If |pem_path| does not exist, create a new key at
+  // |pem_out_path|.
+  // Return the path to the crx file, or an empty FilePath if there were errors.
+  FilePath PackExtensionWithOptions(const FilePath& dir_path,
+                                    const FilePath& crx_path,
+                                    const FilePath& pem_path,
+                                    const FilePath& pem_out_path);
+
   // |expected_change| indicates how many extensions should be installed (or
   // disabled, if negative).
   // 1 means you expect a new install, 0 means you expect an upgrade, -1 means
   // you expect a failed upgrade.
   bool InstallExtension(const FilePath& path, int expected_change) {
     return InstallOrUpdateExtension("", path, INSTALL_UI_TYPE_NONE,
                                     expected_change);
   }
 
   // Installs extension as if it came from the Chrome Webstore.
@@ skipping 96 matching lines @@
   // When waiting for page action count to change, we wait until it reaches this
   // value.
   int target_page_action_count_;
 
   // When waiting for visible page action count to change, we wait until it
   // reaches this value.
   int target_visible_page_action_count_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_