Move all callers of GetHomeDir() to PathService::Get(base::DIR_HOME).

base/nix/mime_util_xdg.cc

Index: base/nix/mime_util_xdg.cc
diff --git a/base/nix/mime_util_xdg.cc b/base/nix/mime_util_xdg.cc
index 51d0900706ae52ea9b284e86c5a27e6826f656dc..91ed381c4d566943d49786814c544a304d17b2c2 100644
--- a/base/nix/mime_util_xdg.cc
+++ b/base/nix/mime_util_xdg.cc
@@ -9,6 +9,7 @@
 #include <map>
 #include <vector>
 
+#include "base/base_paths.h"
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
@@ -16,6 +17,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "base/nix/xdg_util.h"
+#include "base/path_service.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/synchronization/lock.h"
@@ -413,7 +415,8 @@ void AddXDGDataDir(const FilePath& dir) {
 
 // Add all the xdg icon directories.
 void InitIconDir() {
-  FilePath home = GetHomeDir();
+  FilePath home;
+  PathService::Get(base::DIR_HOME, &home);
   if (!home.empty()) {
       FilePath legacy_data_dir(home);
       legacy_data_dir = legacy_data_dir.AppendASCII(".icons");