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

base/file_util_posix.cc

Index: base/file_util_posix.cc
diff --git a/base/file_util_posix.cc b/base/file_util_posix.cc
index f04053dd0fdd84051d892361bd29dfa9c8f5be5a..4b2a53769b835c136138ad37d7e908b55f3a11b1 100644
--- a/base/file_util_posix.cc
+++ b/base/file_util_posix.cc
@@ -458,8 +458,12 @@ bool GetTempDir(FilePath* path) {
 #if !defined(OS_MACOSX)  // Mac implementation is in file_util_mac.mm.
 FilePath GetHomeDir() {
 #if defined(OS_CHROMEOS)
-  if (SysInfo::IsRunningOnChromeOS())
-    return FilePath("/home/chronos/user");
+  if (SysInfo::IsRunningOnChromeOS()) {
+    // On Chrome OS chrome::DIR_USER_DATA is overriden with a primary user
+    // homedir once it becomes available.
+    NOTREACHED() << "Called GetHomeDir() without base::DIR_HOME override";
+    return FilePath("/");
+  }
 #endif
 
   const char* home_dir = getenv("HOME");