mac: Prepare most test code for -Wunused-functions too.

chrome/service/cloud_print/printer_job_handler_unittest.cc

 // Copyright (c) 2013 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 "base/files/file_path.h"
 #include "base/md5.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 191 matching lines @@
                                              i+1);
     if (i != num_jobs-1) job_objects = job_objects + ",";
   }
   return StringPrintf(kExampleJobListResponse, job_objects.c_str());
 }
 
 GURL JobListURI(const char* reason) {
   return GURL(StringPrintf(kExamplePrinterJobListURI, reason));
 }
 
-std::string JobID(int job_num) {
-  return StringPrintf(kExampleJobID, job_num);
-}
-
 GURL DoneURI(int job_num) {
   return GURL(StringPrintf(kExampleUpdateDoneURI, job_num));
 }
 
 GURL ErrorURI(int job_num) {
   return GURL(StringPrintf(kExampleUpdateErrorURI, job_num));
 }
 
 GURL TicketURI(int job_num) {
   return GURL(StringPrintf(kExamplePrintTicketURI, job_num));
@@ skipping 578 matching lines @@
       .WillOnce(InvokeWithoutArgs(
           this, &PrinterJobHandlerTest::MakeJobFetchReturnNoJobs));
 
   EXPECT_CALL(url_callback_, OnRequestCreate(TicketURI(1), _))
       .Times(AtLeast(kNumRetriesBeforeAbandonJob));
 
   BeginTest(70);
 }
 
 }  // namespace cloud_print