Add GetUsbKeyCode dev interface for Pepper key events

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.h

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.h
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.h b/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.h
index b56797bfe1c2b2f1b806c70d185656db84c28413..d01536fa004cb065e50332a19433f2d5be0c047a 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.h
+++ b/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.h
@@ -8,6 +8,7 @@
 #include "native_client/src/include/nacl_macros.h"
 #include "native_client/src/shared/ppapi_proxy/input_event_data.h"
 #include "native_client/src/shared/ppapi_proxy/plugin_resource.h"
+#include "ppapi/c/dev/ppb_keyboard_input_event_dev.h"
 #include "ppapi/c/ppb_input_event.h"
 
 namespace ppapi_proxy {
@@ -31,6 +32,7 @@ class PluginInputEvent : public PluginResource {
   static const PPB_MouseInputEvent* GetMouseInterface1_1();
   static const PPB_WheelInputEvent* GetWheelInterface();
   static const PPB_KeyboardInputEvent* GetKeyboardInterface();
+  static const PPB_KeyboardInputEvent_Dev* GetKeyboardInterface_Dev();
 
   PP_InputEvent_Type GetType() const;
   PP_TimeTicks GetTimeStamp() const;
@@ -48,6 +50,9 @@ class PluginInputEvent : public PluginResource {
   uint32_t GetKeyCode() const;
   PP_Var GetCharacterText() const;
 
+  PP_Bool SetUsbScanCode(uint32_t usb_scan_code);
+  uint32_t GetUsbScanCode() const;
+
  private:
   IMPLEMENT_RESOURCE(PluginInputEvent);
   NACL_DISALLOW_COPY_AND_ASSIGN(PluginInputEvent);