Add tilt_x and tilt_y to ppapi touchpoint.

ppapi/cpp/input_event.cc

Index: ppapi/cpp/input_event.cc
diff --git a/ppapi/cpp/input_event.cc b/ppapi/cpp/input_event.cc
index 90f41fa2b8fbaeb99a51990a221a27dac8d3ac25..2bd3ec71c6b04efba886922c7f0852b0432288b9 100644
--- a/ppapi/cpp/input_event.cc
+++ b/ppapi/cpp/input_event.cc
@@ -39,6 +39,11 @@ template <> const char* interface_name<PPB_TouchInputEvent_1_0>() {
   return PPB_TOUCH_INPUT_EVENT_INTERFACE_1_0;
 }
 
+template <>
+const char* interface_name<PPB_TouchInputEvent_1_4>() {
+  return PPB_TOUCH_INPUT_EVENT_INTERFACE_1_4;
+}
+
 template <> const char* interface_name<PPB_IMEInputEvent_1_0>() {
   return PPB_IME_INPUT_EVENT_INTERFACE_1_0;
 }
@@ -324,14 +329,32 @@ TouchPoint TouchInputEvent::GetTouchById(PP_TouchListType list,
                                              uint32_t id) const {
   if (!has_interface<PPB_TouchInputEvent_1_0>())
     return TouchPoint();
-  return TouchPoint(get_interface<PPB_TouchInputEvent_1_0>()->
-                        GetTouchById(pp_resource(), list, id));
+
+  if (has_interface<PPB_TouchInputEvent_1_4>()) {
+    return TouchPoint(
+        get_interface<PPB_TouchInputEvent_1_4>()->GetTouchById(pp_resource(),
+                                                               list, id),
+        get_interface<PPB_TouchInputEvent_1_4>()->GetTouchTiltById(
+            pp_resource(), list, id));
+  }
+
+  return TouchPoint(get_interface<PPB_TouchInputEvent_1_0>()->GetTouchById(
+      pp_resource(), list, id));
 }
 
 TouchPoint TouchInputEvent::GetTouchByIndex(PP_TouchListType list,
                                                 uint32_t index) const {
   if (!has_interface<PPB_TouchInputEvent_1_0>())
     return TouchPoint();
+
+  if (has_interface<PPB_TouchInputEvent_1_4>()) {
+    return TouchPoint(
+        get_interface<PPB_TouchInputEvent_1_4>()->GetTouchByIndex(pp_resource(),
+                                                                  list, index),
+        get_interface<PPB_TouchInputEvent_1_4>()->GetTouchTiltByIndex(
+            pp_resource(), list, index));
+  }
+
   return TouchPoint(get_interface<PPB_TouchInputEvent_1_0>()->
                         GetTouchByIndex(pp_resource(), list, index));
 }