Add TestingInstance::EvalScript method which posts a message that the test page can eval().

ppapi/tests/test_input_event.h

Index: ppapi/tests/test_input_event.h
===================================================================
--- ppapi/tests/test_input_event.h	(revision 114053)
+++ ppapi/tests/test_input_event.h	(working copy)
@@ -41,7 +41,7 @@
   pp::InputEvent CreateCharEvent(const std::string& text);
 
   bool SimulateInputEvent(const pp::InputEvent& input_event);
-  bool AreEquivalentEvents(PP_Resource first, PP_Resource second);
+  bool IsExpectedEvent(PP_Resource input_event);
 
   std::string TestEvents();
 
@@ -51,7 +51,14 @@
   const struct PPB_KeyboardInputEvent* keyboard_input_event_interface_;
 
   pp::Rect view_rect_;
-  pp::InputEvent expected_input_event_;
+  PP_InputEvent_Type expected_event_type_;
+  PP_InputEvent_MouseButton expected_mouse_buttons_;
+  int32_t expected_mouse_click_count_;
+  pp::FloatPoint expected_wheel_delta_;
+  pp::FloatPoint expected_wheel_ticks_;
+  PP_Bool expected_wheel_scroll_by_page_;
+  uint32_t expected_key_code_;
+  std::string expected_char_text_;
   bool received_expected_event_;
   bool received_finish_message_;
 };