Add comment to PPB_MouseInputEvent version 1.1 that GetMovement hasn't been supported.

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

 // Copyright (c) 2011 The Native Client Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "native_client/src/shared/ppapi_proxy/browser_ppp_input_event.h"
 
 #include "native_client/src/include/nacl_scoped_ptr.h"
 #include "native_client/src/include/portability.h"
 #include "native_client/src/shared/ppapi_proxy/browser_globals.h"
 #include "native_client/src/shared/ppapi_proxy/input_event_data.h"
@@ skipping 21 matching lines @@
 
   switch (data.event_type) {
     // These events all use the PPB_MouseInputEvent interface.
     case PP_INPUTEVENT_TYPE_MOUSEDOWN:
     case PP_INPUTEVENT_TYPE_MOUSEUP:
     case PP_INPUTEVENT_TYPE_MOUSEENTER:
     case PP_INPUTEVENT_TYPE_MOUSELEAVE:
     case PP_INPUTEVENT_TYPE_MOUSEMOVE:
     case PP_INPUTEVENT_TYPE_CONTEXTMENU:
       data.mouse_button =
-          PPBMouseInputEventInterface()->GetButton(input_event);
+          PPBMouseInputEventDevInterface()->GetButton(input_event);
       data.mouse_position =
-          PPBMouseInputEventInterface()->GetPosition(input_event);
+          PPBMouseInputEventDevInterface()->GetPosition(input_event);
       data.mouse_click_count =
-          PPBMouseInputEventInterface()->GetClickCount(input_event);
+          PPBMouseInputEventDevInterface()->GetClickCount(input_event);
       data.mouse_movement =
-          PPBMouseInputEventInterface()->GetMovement(input_event);
+          PPBMouseInputEventDevInterface()->GetMovement(input_event);
       break;
     // This event uses the PPB_WheelInputEvent interface.
     case PP_INPUTEVENT_TYPE_WHEEL:
       data.wheel_delta =
           PPBWheelInputEventInterface()->GetDelta(input_event);
       data.wheel_ticks =
           PPBWheelInputEventInterface()->GetTicks(input_event);
       data.wheel_scroll_by_page =
           PPBWheelInputEventInterface()->GetScrollByPage(input_event);
       break;
@@ skipping 49 matching lines @@
 }  // namespace
 
 const PPP_InputEvent* BrowserInputEvent::GetInterface() {
   static const PPP_InputEvent input_event_interface = {
     HandleInputEvent
   };
   return &input_event_interface;
 }
 
 }  // namespace ppapi_proxy