[Chromoting] Add a host domain policy to the PolicyWatcher.

remoting/host/policy_hack/policy_watcher.h

Index: remoting/host/policy_hack/policy_watcher.h
diff --git a/remoting/host/policy_hack/policy_watcher.h b/remoting/host/policy_hack/policy_watcher.h
index ac0a567aa0f64c221919c6b79f4a8f519ca9d6dc..123073dde2be7b7156749e9bb55c4d32aec7ec83 100644
--- a/remoting/host/policy_hack/policy_watcher.h
+++ b/remoting/host/policy_hack/policy_watcher.h
@@ -49,6 +49,9 @@ class PolicyWatcher {
   // The name of the NAT traversal policy.
   static const char kNatPolicyName[];
 
+  // The name of the host domain policy.
+  static const char kHostDomainPolicyName[];
+
  protected:
   virtual void StartWatchingInternal() = 0;
   virtual void StopWatchingInternal() = 0;
@@ -70,6 +73,10 @@ class PolicyWatcher {
   static const char* const kBooleanPolicyNames[];
   static const int kBooleanPolicyNamesNum;
 
+  // The names of policies with string values.
+  static const char* const kStringPolicyNames[];
+  static const int kStringPolicyNamesNum;
+
  private:
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;