Add GetUsbKeyCode dev interface for Pepper key events

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

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.cc
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.cc b/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.cc
index 31d595cd8d3706b06b29e371fe5d032c1cf3518f..0396707cc5d232ed0afc391d5e84cfa281189ae7 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.cc
+++ b/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_input_event.cc
@@ -265,11 +265,13 @@ PP_Resource CreateKeyboardInputEvent(PP_Instance instance,
                                      PP_TimeTicks time_stamp,
                                      uint32_t modifiers,
                                      uint32_t key_code,
+                                   uint32_t usb_scan_code,
                                      struct PP_Var character_text) {
   DebugPrintf("PPB_InputEvent::CreateKeyboardInputEvent: instance="
               "%"NACL_PRId32", type=%d, time_stamp=%lf, modifiers="
-              "%"NACL_PRIu32", key_code=%"NACL_PRIu32"\n",
-              instance, type, time_stamp, modifiers, key_code);
+              "%"NACL_PRIu32", key_code=%"NACL_PRIu32", usb_scan_code="
+              "%"NACL_PRIu32"\n",
+              instance, type, time_stamp, modifiers, key_code, usb_scan_code);
   // Serialize the character_text Var.
   uint32_t text_size = 0;
   nacl::scoped_array<char> text_bytes(Serialize(&character_text, 1,
@@ -283,6 +285,7 @@ PP_Resource CreateKeyboardInputEvent(PP_Instance instance,
           static_cast<double>(time_stamp),
           static_cast<int32_t>(modifiers),
           static_cast<int32_t>(key_code),
+          static_cast<int32_t>(usb_scan_code),
           text_size,
           text_bytes.get(),
           &resource_id);
@@ -304,6 +307,10 @@ uint32_t GetKeyCode(PP_Resource key_event) {
   IMPLEMENT_RESOURCE_THUNK(GetKeyCode, key_event, 0);
 }
 
+uint32_t GetUsbScanCode_Dev(PP_Resource key_event) {
+  IMPLEMENT_RESOURCE_THUNK(GetUsbScanCode_Dev, key_event, 0);
+}
+
 PP_Var GetCharacterText(PP_Resource character_event) {
   IMPLEMENT_RESOURCE_THUNK(GetCharacterText, character_event,
                            PP_MakeUndefined());
@@ -370,6 +377,7 @@ const PPB_KeyboardInputEvent* PluginInputEvent::GetKeyboardInterface() {
     CreateKeyboardInputEvent,
     IsKeyboardInputEvent,
     ::GetKeyCode,
+    ::GetUsbScanCode_Dev,
     ::GetCharacterText
   };
   return &keyboard_input_event_interface;
@@ -434,6 +442,10 @@ uint32_t PluginInputEvent::GetKeyCode() const {
   return input_event_data_.key_code;
 }
 
+uint32_t PluginInputEvent::GetUsbScanCode_Dev() const {
+  return input_event_data_.usb_scan_code;
+}
+
 PP_Var PluginInputEvent::GetCharacterText() const {
   PPBVarInterface()->AddRef(character_text_);
   return character_text_;