chromeos: Fix wrong ZipSelectionFunction src_dir check

GetLocalPathFromURL returns the logical path, not the cache path of the entry.

BUG=None

Review URL: https://chromiumcodereview.appspot.com/14320015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195206 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/extensions/file_manager/file_browser_private_api.cc

@@ -3222,12 +3222,9 @@ bool ZipSelectionFunction::RunImpl() {
   if (!args_->GetString(2, &dest_name) || dest_name.empty())
     return false;
 
-  // Check if the dir path is under Drive cache directory.
+  // Check if the dir path is under Drive mount point.
   // TODO(hshi): support create zip file on Drive (crbug.com/158690).
-  drive::DriveSystemService* system_service =
-      drive::DriveSystemServiceFactory::GetForProfile(profile_);
-  drive::DriveCache* cache = system_service ? system_service->cache() : NULL;
-  if (cache && cache->IsUnderDriveCacheDirectory(src_dir))
+  if (drive::util::IsUnderDriveMountPoint(src_dir))
     return false;
 
   base::FilePath dest_file = src_dir.Append(dest_name);