Add OS_CHROMEOS case in file_util::GetHomeDir()

webkit/chromeos/fileapi/cros_mount_point_provider.cc

Index: webkit/chromeos/fileapi/cros_mount_point_provider.cc
diff --git a/webkit/chromeos/fileapi/cros_mount_point_provider.cc b/webkit/chromeos/fileapi/cros_mount_point_provider.cc
index 4b834a957ec863b48ad2295a0f52ee66c9e6b1aa..a70bc64f16dea95272d047232e17fd26bf538585 100644
--- a/webkit/chromeos/fileapi/cros_mount_point_provider.cc
+++ b/webkit/chromeos/fileapi/cros_mount_point_provider.cc
@@ -30,18 +30,6 @@ namespace {
 
 const char kChromeUIScheme[] = "chrome";
 
-// Returns the home directory path, or an empty string if the home directory
-// is not found.
-std::string GetHomeDirectory() {
-  if (base::chromeos::IsRunningOnChromeOS())
-    return "/home/chronos/user";
-
-  const char* home = getenv("HOME");
-  if (home)
-    return home;
-  return "";
-}
-
 }  // namespace
 
 namespace chromeos {
@@ -63,7 +51,7 @@ CrosMountPointProvider::CrosMountPointProvider(
     : special_storage_policy_(special_storage_policy),
       file_access_permissions_(new FileAccessPermissions()),
       local_file_util_(new fileapi::LocalFileUtil()) {
-  const std::string home = GetHomeDirectory();
+  const std::string home = base::chromeos::GetHomeDirectory();
   if (!home.empty()) {
     AddLocalMountPoint(
         FilePath::FromUTF8Unsafe(home).AppendASCII("Downloads"));