Remove an old TODO in net/base.

net/base/platform_mime_util_linux.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 "net/base/platform_mime_util.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "build/build_config.h"
 
 #if defined(OS_ANDROID)
 #include "net/android/network_library.h"
 #else
 #include "base/nix/mime_util_xdg.h"
 #endif
 
 namespace net {
 
 #if defined(OS_ANDROID)
 bool PlatformMimeUtil::GetPlatformMimeTypeFromExtension(
     const base::FilePath::StringType& ext, std::string* result) const {
   return android::GetMimeTypeFromExtension(ext, result);
 }
 #else
 bool PlatformMimeUtil::GetPlatformMimeTypeFromExtension(
     const base::FilePath::StringType& ext, std::string* result) const {
-  // TODO(thestig): This is a temporary hack until we can fix this
-  // properly in test shell / webkit.
-  // We have to play dumb and not return application/x-perl here
-  // to make the reload-subframe-object layout test happy.
-  if (ext == "pl")
-    return false;
-
   base::FilePath dummy_path("foo." + ext);
   std::string out = base::nix::GetFileMimeType(dummy_path);
 
   // GetFileMimeType likes to return application/octet-stream
   // for everything it doesn't know - ignore that.
   if (out == "application/octet-stream" || out.empty())
     return false;
 
   // GetFileMimeType returns image/x-ico because that's what's in the XDG
   // mime database. That database is the merger of the Gnome and KDE mime
@@ skipping 56 matching lines @@
 
 void PlatformMimeUtil::GetPlatformExtensionsForMimeType(
     const std::string& mime_type,
     base::hash_set<base::FilePath::StringType>* extensions) const {
   base::FilePath::StringType ext;
   if (GetPreferredExtensionForMimeType(mime_type, &ext))
     extensions->insert(ext);
 }
 
 }  // namespace net