mac: Prepare for -Wunused-functions.

content/browser/download/download_manager_impl.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 "content/browser/download/download_manager_impl.h"
 
 #include <iterator>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 139 matching lines @@
 
   bool operator!=(const MapValueIteratorAdapter& that) const {
     return iter_ != that.iter_;
   }
 
  private:
   base::hash_map<int64, DownloadItem*>::const_iterator iter_;
   // Allow copy and assign.
 };
 
-void EnsureNoPendingDownloadJobsOnFile(bool* result) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  *result = (DownloadFile::GetNumberOfDownloadFiles() == 0);
-  BrowserThread::PostTask(
-      BrowserThread::UI, FROM_HERE, base::MessageLoop::QuitClosure());
-}
-
 class DownloadItemFactoryImpl : public DownloadItemFactory {
  public:
   DownloadItemFactoryImpl() {}
   virtual ~DownloadItemFactoryImpl() {}
 
   virtual DownloadItemImpl* CreatePersistedItem(
       DownloadItemImplDelegate* delegate,
       uint32 download_id,
       const base::FilePath& current_path,
       const base::FilePath& target_path,
@@ skipping 537 matching lines @@
   if (delegate_)
     delegate_->OpenDownload(download);
 }
 
 void DownloadManagerImpl::ShowDownloadInShell(DownloadItemImpl* download) {
   if (delegate_)
     delegate_->ShowDownloadInShell(download);
 }
 
 }  // namespace content