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..31885892de888812d9f6767bf1a9c9f12fc64fee 100644
--- a/ppapi/cpp/input_event.cc
+++ b/ppapi/cpp/input_event.cc
@@ -324,14 +324,32 @@ 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_1>()) {
+    return TouchPoint(
+        get_interface<PPB_TouchInputEvent_1_1>()->GetTouchById(pp_resource(),
+                                                               list, id),
+        get_interface<PPB_TouchInputEvent_1_1>()->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_1>()) {
+    return TouchPoint(
+        get_interface<PPB_TouchInputEvent_1_1>()->GetTouchByIndex(pp_resource(),
+                                                                  list, index),
+        get_interface<PPB_TouchInputEvent_1_1>()->GetTouchTiltByIndex(
+            pp_resource(), list, index));
+  }
+
   return TouchPoint(get_interface<PPB_TouchInputEvent_1_0>()->
                         GetTouchByIndex(pp_resource(), list, index));
 }