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

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

 // Copyright (c) 2011 The Chromium 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_globals.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <map>
@@ skipping 260 matching lines @@
   return ppb;
 }
 
 const PPB_MouseInputEvent* PPBMouseInputEventInterface() {
   static const PPB_MouseInputEvent* ppb =
       static_cast<const PPB_MouseInputEvent*>(
           GetBrowserInterfaceSafe(PPB_MOUSE_INPUT_EVENT_INTERFACE));
   return ppb;
 }
 
+const PPB_MouseInputEvent_Dev* PPBMouseInputEventDevInterface() {
+  static const PPB_MouseInputEvent_Dev* ppb =
+      static_cast<const PPB_MouseInputEvent_Dev*>(
+          GetBrowserInterfaceSafe(PPB_MOUSE_INPUT_EVENT_DEV_INTERFACE));
+  return ppb;
+}
+
 const PPB_URLLoader* PPBURLLoaderInterface() {
   static const PPB_URLLoader* ppb =
       static_cast<const PPB_URLLoader*>(
           GetBrowserInterfaceSafe(PPB_URLLOADER_INTERFACE));
   return ppb;
 }
 
 const PPB_URLRequestInfo* PPBURLRequestInfoInterface() {
   static const PPB_URLRequestInfo* ppb =
       static_cast<const PPB_URLRequestInfo*>(
@@ skipping 102 matching lines @@
 
 // Private interfaces.
 const PPB_PDF* PPBPDFInterface() {
   static const PPB_PDF* ppb =
       static_cast<const PPB_PDF*>(
           GetBrowserInterfaceSafe(PPB_PDF_INTERFACE));
   return ppb;
 }
 
 }  // namespace ppapi_proxy