ppapi: Make sure the touch-event interface is detected correctly.

ppapi/tests/test_input_event.h

Index: ppapi/tests/test_input_event.h
diff --git a/ppapi/tests/test_input_event.h b/ppapi/tests/test_input_event.h
index e2fe9c5e0db6288226e52509487f8f2e9b570c14..de94322bb8f3812d27b66ece4832400eb9f15ce8 100644
--- a/ppapi/tests/test_input_event.h
+++ b/ppapi/tests/test_input_event.h
@@ -35,6 +35,8 @@ class TestInputEvent : public TestCase {
   pp::InputEvent CreateKeyEvent(PP_InputEvent_Type type,
                                 uint32_t key_code);
   pp::InputEvent CreateCharEvent(const std::string& text);
+  pp::InputEvent CreateTouchEvent(PP_InputEvent_Type type,
+                                  const pp::FloatPoint& location);
 
   bool SimulateInputEvent(const pp::InputEvent& input_event);
   bool AreEquivalentEvents(PP_Resource first, PP_Resource second);
@@ -49,6 +51,7 @@ class TestInputEvent : public TestCase {
   const PPB_MouseInputEvent* mouse_input_event_interface_;
   const PPB_WheelInputEvent* wheel_input_event_interface_;
   const PPB_KeyboardInputEvent* keyboard_input_event_interface_;
+  const PPB_TouchInputEvent* touch_input_event_interface_;
 
   pp::Rect view_rect_;
   pp::InputEvent expected_input_event_;