Send enums as strings between Chromoting Native Messaging host and web-app.

remoting/host/setup/native_messaging_host.h

Index: remoting/host/setup/native_messaging_host.h
diff --git a/remoting/host/setup/native_messaging_host.h b/remoting/host/setup/native_messaging_host.h
index 9c375ad56c7693631cb7cac3573b06b68e46aee3..08047ae792156de8698316e56d2989c3bddd7de6 100644
--- a/remoting/host/setup/native_messaging_host.h
+++ b/remoting/host/setup/native_messaging_host.h
@@ -25,6 +25,22 @@ namespace remoting {
 // Implementation of the native messaging host process.
 class NativeMessagingHost {
  public:
+
+  // These names must match the enumeration key names in host_controller.js.
+  static const char kStateNotImplemented[];
+  static const char kStateNotInstalled[];
+  static const char kStateInstalling[];
+  static const char kStateStopped[];
+  static const char kStateStarting[];
+  static const char kStateStarted[];
+  static const char kStateStopping[];
+  static const char kStateUnknown[];
+
+  static const char kResultOk[];
+  static const char kResultFailed[];
+  static const char kResultCancelled[];
+  static const char kResultFailedDirectory[];
+
   NativeMessagingHost(
       scoped_ptr<DaemonController> daemon_controller,
       base::PlatformFile input,