Add touch events to the protocol, the stub layer, and to the client plugin.

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 f6e8d32e9fc4a3dfb62ddccf02ba5b165457a4f2..ab94c116bed92e11b4feb8eb6643d31362408a91 100644
--- a/remoting/client/plugin/chromoting_instance.h
+++ b/remoting/client/plugin/chromoting_instance.h
@@ -25,6 +25,7 @@
 #include "remoting/client/plugin/pepper_input_handler.h"
 #include "remoting/client/plugin/pepper_plugin_thread_delegate.h"
 #include "remoting/client/plugin/pepper_video_renderer.h"
+#include "remoting/client/plugin/touch_input_scaler.h"
 #include "remoting/proto/event.pb.h"
 #include "remoting/protocol/client_stub.h"
 #include "remoting/protocol/clipboard_stub.h"
@@ -192,6 +193,7 @@ class ChromotingInstance : public ClientUserInterface,
   void HandleAllowMouseLockMessage();
   void HandleSendMouseInputWhenUnfocused();
   void HandleDelegateLargeCursors();
+  void HandleEnableTouchEvents();
 
   void Disconnect();
 
@@ -250,6 +252,7 @@ class ChromotingInstance : public ClientUserInterface,
   // Input pipeline components, in reverse order of distance from input source.
   protocol::MouseInputFilter mouse_input_filter_;
   protocol::InputEventTracker input_tracker_;
+  TouchInputScaler touch_input_scaler_;
   KeyEventMapper key_mapper_;
   scoped_ptr<protocol::InputFilter> normalizing_input_filter_;
   PepperInputHandler input_handler_;