Add tilt_x and tilt_y to ppapi touchpoint.

ppapi/thunk/ppb_input_event_api.h

Index: ppapi/thunk/ppb_input_event_api.h
diff --git a/ppapi/thunk/ppb_input_event_api.h b/ppapi/thunk/ppb_input_event_api.h
index c2e7d0fe113bf0152b396520aa6e2c3752428051..886637f064f624108659a8371120f9164d8b15bb 100644
--- a/ppapi/thunk/ppb_input_event_api.h
+++ b/ppapi/thunk/ppb_input_event_api.h
@@ -49,6 +49,11 @@ class PPAPI_THUNK_EXPORT PPB_InputEvent_API {
                                         uint32_t index) = 0;
   virtual PP_TouchPoint GetTouchById(PP_TouchListType list,
                                      uint32_t id) = 0;
+  virtual PP_FloatPoint GetTouchTiltByIndex(PP_TouchListType list,
+                                            uint32_t index) = 0;
+
+  virtual PP_FloatPoint GetTouchTiltById(PP_TouchListType list,
+                                         uint32_t id) = 0;
 };
 
 }  // namespace thunk