AppShell support for Mac.

extensions/shell/app/shell_main_mac.h

Index: extensions/shell/app/shell_main_mac.h
diff --git a/extensions/shell/app/shell_main_mac.h b/extensions/shell/app/shell_main_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..df3ff5b73e4b99a7ebf0a53b106cd8fbaf7bc2c7
--- /dev/null
+++ b/extensions/shell/app/shell_main_mac.h
@@ -0,0 +1,17 @@
+// Copyright 2014 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 EXTENSIONS_SHELL_APP_SHELL_MAIN_MAC_H_
+#define EXTENSIONS_SHELL_APP_SHELL_MAIN_MAC_H_
+
+#include "base/basictypes.h"

[James Cook, 2014/12/10 21:05:00]

Does this really need basictypes.h?  Or macros.h?  Or compiler_specific.h?

[Yoyo Zhou, 2014/12/11 02:40:50]

I figured out it needed build/build_config.h for OS_MACOSX.

+
+#if defined(OS_MACOSX)
+extern "C" {
+__attribute__((visibility("default"))) int ContentMain(int argc,
+                                                       const char** argv);
+}  // extern "C"
+#endif  // OS_MACOSX
+
+#endif  // CONTENT_SHELL_APP_SHELL_CONTENT_MAIN_H_