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 cb94e079fa4f79c9ef64d6eb41b2cdb1e5cc7368..c07a7e173dbccab0ab3c78c6174f371b1b99d747 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"
@@ -195,6 +196,7 @@ class ChromotingInstance : public ClientUserInterface,
   void HandleSendMouseInputWhenUnfocused();
   void HandleDelegateLargeCursors();
   void HandleEnableDebugRegion(const base::DictionaryValue& data);
+  void HandleEnableTouchEvents();
 
   void Disconnect();
 
@@ -256,6 +258,7 @@ 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_;