Add enable_vp9 option to host config.

remoting/host/chromoting_host.h

Index: remoting/host/chromoting_host.h
diff --git a/remoting/host/chromoting_host.h b/remoting/host/chromoting_host.h
index 73e844261369e041794abdf74af4d4bfa4b48d98..fe2c26fa60036caa53d33cf83119e3bd868671ee 100644
--- a/remoting/host/chromoting_host.h
+++ b/remoting/host/chromoting_host.h
@@ -139,13 +139,14 @@ class ChromotingHost : public base::NonThreadSafe,
       protocol::Session* session,
       protocol::SessionManager::IncomingSessionResponse* response) OVERRIDE;
 
+  // Gets the candidate configuration for the protocol.
+  const protocol::CandidateSessionConfig* protocol_config() const {
+    return protocol_config_.get();
+  }
+
   // Sets desired configuration for the protocol. Must be called before Start().
   void set_protocol_config(scoped_ptr<protocol::CandidateSessionConfig> config);
 
-  base::WeakPtr<ChromotingHost> AsWeakPtr() {
-    return weak_factory_.GetWeakPtr();
-  }
-
   // The host uses a pairing registry to generate and store pairing information
   // for clients for PIN-less authentication.
   scoped_refptr<protocol::PairingRegistry> pairing_registry() const {
@@ -156,6 +157,10 @@ class ChromotingHost : public base::NonThreadSafe,
     pairing_registry_ = pairing_registry;
   }
 
+  base::WeakPtr<ChromotingHost> AsWeakPtr() {
+    return weak_factory_.GetWeakPtr();
+  }
+
  private:
   friend class ChromotingHostTest;