Extend PathService::Get to be able to return the X86 program files path.

cloud_print/virtual_driver/win/port_monitor/port_monitor.cc

Index: cloud_print/virtual_driver/win/port_monitor/port_monitor.cc
diff --git a/cloud_print/virtual_driver/win/port_monitor/port_monitor.cc b/cloud_print/virtual_driver/win/port_monitor/port_monitor.cc
index 5141f99615b32da64d945c929db0289285aed41b..cd54d2a3c40fc44038c26762451df9df758e5e9d 100644
--- a/cloud_print/virtual_driver/win/port_monitor/port_monitor.cc
+++ b/cloud_print/virtual_driver/win/port_monitor/port_monitor.cc
@@ -271,16 +271,7 @@ bool GetChromeExePath(FilePath* chrome_path) {
 
   // Chrome doesn't appear to be installed per user.
   // Now check %programfiles(x86)%\google\chrome\application
-  // TODO(abodenha@chromium.org) Extend PathService::Get to be able to
-  // return the X86 program files path.  At a minimum, use SHGetKnownFolderPath
-  // instead.
-  wchar_t system_buffer[MAX_PATH] = L"";
-  SHGetFolderPath(NULL,
-                  CSIDL_PROGRAM_FILESX86,
-                  NULL,
-                  SHGFP_TYPE_CURRENT,
-                  system_buffer);
-  path = FilePath(system_buffer);
+  PathService::Get(base::DIR_PROGRAM_FILESX86, &path);
   path = path.Append(kChromeExePath);
   if (file_util::PathExists(path)) {
     *chrome_path = FilePath(path.value());