GTK: Improve xfce detection.

base/linux_util.h

 // Copyright (c) 2010 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.
 
 #ifndef BASE_LINUX_UTIL_H_
 #define BASE_LINUX_UTIL_H_
 
 #include <stdint.h>
 #include <sys/types.h>
 
 #include <string>
 
-class EnvVarGetter;
 class FilePath;
 
 namespace base {
 
+class EnvVarGetter;
+
 static const char kFindInodeSwitch[] = "--find-inode";
 
 // Makes a copy of |pixels| with the ordering changed from BGRA to RGBA.
 // The caller is responsible for free()ing the data. If |stride| is 0,
 // it's assumed to be 4 * |width|.
 uint8_t* BGRAToRGBA(const uint8_t* pixels, int width, int height, int stride);
 
 // Get the Linux Distro if we can, or return "Unknown", similar to
 // GetWinVersion() in base/win_util.h.
 std::string GetLinuxDistro();
@@ skipping 40 matching lines @@
 // Return the inode number for the UNIX domain socket |fd|.
 bool FileDescriptorGetInode(ino_t* inode_out, int fd);
 
 // Find the process which holds the given socket, named by inode number. If
 // multiple processes hold the socket, this function returns false.
 bool FindProcessHoldingSocket(pid_t* pid_out, ino_t socket_inode);
 
 }  // namespace base
 
 #endif  // BASE_LINUX_UTIL_H_