Implement installation of the Chrome App Host.

chrome/browser/extensions/app_host_stub_main.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 "base/at_exit.h"
+#include "base/command_line.h"
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/process_util.h"
+#include "chrome/installer/launcher_support/chrome_launcher_support.h"
+
+namespace {
+
+const wchar_t kChromeExe[] = L"chrome.exe";
+
+}  // namespace
+
+int main(int /* argc */, char* /* argv[] */) {
+  base::AtExitManager exit_manager;
+
+  // Initialize the commandline singleton from the environment.
+  CommandLine::Init(0, NULL);
+
+  FilePath chrome_exe(chrome_launcher_support::GetAnyChromePath());
+
+  if (chrome_exe.empty()) {
+    LOG(ERROR) << "No Chrome executable could be found.";
+    // TODO(erikwright): install Chrome.
+    return 1;
+  }
+
+  CommandLine chrome_exe_command_line(chrome_exe);
+  chrome_exe_command_line.AppendArguments(
+      *CommandLine::ForCurrentProcess(), false);
+
+  if (base::LaunchProcess(chrome_exe_command_line,
+                          base::LaunchOptions(),
+                          NULL)) {
+    LOG(INFO) << "Delegated to Chrome executable at " << chrome_exe.value();
+    return 0;
+  } else {
+    LOG(INFO) << "Failed to launch Chrome executable at " << chrome_exe.value();
+    return 1;
+  }
+}