Linux: Move base/mime_util* to base/nix. It's not used on any other platform.

base/nix/mime_util_xdg.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 "base/mime_util.h"
-
+#include "base/nix/mime_util_xdg.h"
 
 #include <cstdlib>
 #include <list>
 #include <map>
 #include <vector>
 
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
-#include "base/message_loop.h"
 #include "base/nix/xdg_util.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/synchronization/lock.h"
 #include "base/third_party/xdg_mime/xdgmime.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time.h"
 
 #if defined(TOOLKIT_USES_GTK)
-#include <gtk/gtk.h>
+#include <gtk/gtk.h>  // NOLINT
+
+#include "base/message_loop.h"
 #endif
 
 namespace {
 
 // None of the XDG stuff is thread-safe, so serialize all access under
 // this lock.
 static base::LazyInstance<base::Lock,
                           base::LeakyLazyInstanceTraits<base::Lock> >
     g_mime_util_xdg_lock(base::LINKER_INITIALIZED);
 
@@ skipping 538 matching lines @@
   return LookupFallbackIcon(icon_name);
 }
 
 MimeUtilConstants::~MimeUtilConstants() {
   for (size_t i = 0; i < kDefaultThemeNum; i++)
     delete default_themes_[i];
 }
 
 }  // namespace
 
-namespace mime_util {
+namespace base {
+namespace nix {
 
 std::string GetFileMimeType(const FilePath& filepath) {
   base::ThreadRestrictions::AssertIOAllowed();
   base::AutoLock scoped_lock(g_mime_util_xdg_lock.Get());
   return xdg_mime_get_mime_type_from_file_name(filepath.value().c_str());
 }
 
 std::string GetDataMimeType(const std::string& data) {
   base::ThreadRestrictions::AssertIOAllowed();
   base::AutoLock scoped_lock(g_mime_util_xdg_lock.Get());
@@ skipping 66 matching lines @@
         return icon_file;
     } else {
       icon_file = LookupIconInDefaultTheme(icon_names[i], size);
       if (!icon_file.empty())
         return icon_file;
     }
   }
   return FilePath();
 }
 
-}  // namespace mime_util
+}  // namespace nix
+}  // namespace base