Add GetUsbKeyCode dev interface for Pepper key events

ppapi/native_client/src/shared/ppapi_proxy/ppb_rpc_client.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/ppb_rpc_client.cc
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/ppb_rpc_client.cc b/ppapi/native_client/src/shared/ppapi_proxy/ppb_rpc_client.cc
index a0d7d4438f1552ec08e095dd71cba759ad7d474e..8590aba7a3f51ec88aff2b51e6db4333dabe5ab1 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/ppb_rpc_client.cc
+++ b/ppapi/native_client/src/shared/ppapi_proxy/ppb_rpc_client.cc
@@ -1822,6 +1822,7 @@ NaClSrpcError PpbInputEventRpcClient::PPB_InputEvent_CreateKeyboardInputEvent(
     double time_stamp,
     int32_t modifiers,
     int32_t key_code,
+    int32_t usb_scan_code,
     nacl_abi_size_t character_text_bytes, char* character_text,
     PP_Resource* resource_id)  {
   VCHECK(ppapi_proxy::PPBCoreInterface()->IsMainThread(),
@@ -1830,12 +1831,13 @@ NaClSrpcError PpbInputEventRpcClient::PPB_InputEvent_CreateKeyboardInputEvent(
   NaClSrpcError retval;
   retval = NaClSrpcInvokeBySignature(
       channel,
-      "PPB_InputEvent_CreateKeyboardInputEvent:iidiiC:i",
+      "PPB_InputEvent_CreateKeyboardInputEvent:iidiiiC:i",
       instance,
       type,
       time_stamp,
       modifiers,
       key_code,
+      usb_scan_code,
       character_text_bytes, character_text,
       resource_id
   );