Install platform apps into a separate data directory

chrome/app/chrome_main_app_mode_mac.mm

 // 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.
 
 // On Mac, one can't make shortcuts with command-line arguments. Instead, we
 // produce small app bundles which locate the Chromium framework and load it,
 // passing the appropriate data. This is the entry point into the framework for
 // those app bundles.
 
 #include <string>  // TODO(viettrungluu): only needed for temporary hack
 
 #include "base/basictypes.h"
+#include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "chrome/common/chrome_paths_internal.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/mac/app_mode_common.h"
 
 extern "C" {
 
 // |ChromeAppModeStart()| is the point of entry into the framework from the app
 // mode loader.
 __attribute__((visibility("default")))
 int ChromeAppModeStart(const app_mode::ChromeAppModeInfo* info);
 
 // TODO(viettrungluu): put this in a header file somewhere.
 int ChromeMain(int argc, char** argv);
 
 }  // extern "C"
 
 int ChromeAppModeStart(const app_mode::ChromeAppModeInfo* info) {
   if (info->major_version < app_mode::kCurrentChromeAppModeInfoMajorVersion) {
     RAW_LOG(ERROR, "App Mode Loader too old.");
     return 1;
   }
   if (info->major_version > app_mode::kCurrentChromeAppModeInfoMajorVersion) {
     RAW_LOG(ERROR, "Browser Framework too old to load App Shortcut.");
     return 1;
   }
 
   RAW_CHECK(!info->chrome_versioned_path.empty());
   FilePath* chrome_versioned_path = new FilePath(info->chrome_versioned_path);
   RAW_CHECK(!chrome_versioned_path->empty());
   chrome::SetOverrideVersionedDirectory(chrome_versioned_path);
 
-  // TODO(viettrungluu): do something intelligent with data
-  //  return ChromeMain(info->argc, info->argv);
-  // For now, a cheesy hack instead.
+  CommandLine command_line(CommandLine::NO_PROGRAM);
+  command_line.AppendSwitch(info->argv[0]);
   RAW_CHECK(info->app_mode_id.size());
-  std::string argv1(std::string("--app-id=") + info->app_mode_id);
-  std::string argv2(
-      std::string("--user-data-dir=") + info->user_data_dir.value());
-  char* argv[] = { info->argv[0],
-                   const_cast<char*>(argv1.c_str()),
-                   const_cast<char*>(argv2.c_str()) };
-  return ChromeMain(static_cast<int>(arraysize(argv)), argv);
+  command_line.AppendSwitchASCII(switches::kAppId, info->app_mode_id);
+  command_line.AppendSwitchPath(switches::kUserDataDir, info->user_data_dir);
+  // TODO(sail): Use a different flag that doesn't imply Location::LOAD for the
+  // extension.
+  command_line.AppendSwitchPath(switches::kLoadExtension, info->extension_path);
+
+  int argc = command_line.argv().size();
+  char* argv[argc];
+  for (int i = 0; i < argc; ++i)
+    argv[i] = const_cast<char*>(command_line.argv()[i].c_str());
+
+  return ChromeMain(argc, argv);
 }