PPAPI: Remove instance param from GetFileTaskRunner

ppapi/shared_impl/test_globals.cc

 // Copyright (c) 2012 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 "ppapi/shared_impl/test_globals.h"
 
 namespace ppapi {
 
 TestGlobals::TestGlobals()
     : ppapi::PpapiGlobals(),
@@ skipping 53 matching lines @@
 void TestGlobals::BroadcastLogWithSource(PP_Module module,
                                          PP_LogLevel level,
                                          const std::string& source,
                                          const std::string& value) {
 }
 
 MessageLoopShared* TestGlobals::GetCurrentMessageLoop() {
   return NULL;
 }
 
-base::TaskRunner* TestGlobals::GetFileTaskRunner(PP_Instance instance) {
+base::TaskRunner* TestGlobals::GetFileTaskRunner() {
   return NULL;
 }
 
 bool TestGlobals::IsHostGlobals() const {
   // Pretend to be the host-side, for code that expects one or the other.
   // TODO(dmichael): just make it settable which one we're pretending to be?
   return true;
 }
 
 }  // namespace ppapi