Revert of Restrict use of two app-launching command line flags

chrome/browser/extensions/unpacked_installer.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_UNPACKED_INSTALLER_H_
 #define CHROME_BROWSER_EXTENSIONS_UNPACKED_INSTALLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 32 matching lines @@
   // ExtensionService::AddExtension() is called.
   void Load(const base::FilePath& extension_path);
 
   // Loads the extension from the directory |extension_path|;
   // for use with command line switch --load-extension=path or
   // --load-and-launch-app=path.
   // This is equivalent to Load, except that it reads the extension from
   // |extension_path| synchronously.
   // The return value indicates whether the installation has begun successfully.
   // The id of the extension being loaded is returned in |extension_id|.
-  // |only_allow_apps| is used to avoid side-loading of non-app extensions.
   bool LoadFromCommandLine(const base::FilePath& extension_path,
-                           std::string* extension_id,
-                           bool only_allow_apps);
+                           std::string* extension_id);
 
   // Allows prompting for plugins to be disabled; intended for testing only.
   bool prompt_for_plugins() { return prompt_for_plugins_; }
   void set_prompt_for_plugins(bool val) { prompt_for_plugins_ = val; }
 
   // Allows overriding of whether modern manifest versions are required;
   // intended for testing.
   bool require_modern_manifest_version() const {
     return require_modern_manifest_version_;
   }
@@ skipping 75 matching lines @@
   ExtensionInstallChecker install_checker_;
 
   CompletionCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(UnpackedInstaller);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_UNPACKED_INSTALLER_H_