Added support of relative mouse motion in Chromoting.

remoting/client/plugin/chromoting_instance.h

Index: remoting/client/plugin/chromoting_instance.h
diff --git a/remoting/client/plugin/chromoting_instance.h b/remoting/client/plugin/chromoting_instance.h
index 3dd36c5d27f29aac6684996dfbcaf46ac8c65c49..227bcac0827f0e0024cbcacb5776ada9ee57a33f 100644
--- a/remoting/client/plugin/chromoting_instance.h
+++ b/remoting/client/plugin/chromoting_instance.h
@@ -102,6 +102,7 @@ class ChromotingInstance :
   virtual ~ChromotingInstance();
 
   // pp::Instance interface.
+  virtual void DidChangeFocus(bool has_focus) OVERRIDE;
   virtual void DidChangeView(const pp::View& view) OVERRIDE;
   virtual bool Init(uint32_t argc, const char* argn[],
                     const char* argv[]) OVERRIDE;
@@ -195,6 +196,7 @@ class ChromotingInstance :
   void HandleOnThirdPartyTokenFetched(const base::DictionaryValue& data);
   void HandleRequestPairing(const base::DictionaryValue& data);
   void HandleExtensionMessage(const base::DictionaryValue& data);
+  void HandleAllowMouseLockMessage();
 
   // Helper method called from Connect() to connect with parsed config.
   void ConnectWithConfig(const ClientConfig& config,