[cros] disable GDrive option on certain file pickers

chrome/browser/chromeos/extensions/file_manager_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #include "chrome/browser/chromeos/extensions/file_manager_util.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 338 matching lines @@
       dict->SetBoolean("selected",
                        (static_cast<size_t>(file_type_index) == (i + 1)));
 
       types_list->Set(i, dict);
     }
     arg_value.Set("typeList", types_list);
 
     arg_value.SetBoolean("includeAllFiles", file_types->include_all_files);
   }
 
+  // Disable showing GDrive unless it's specifically supported.
+  arg_value.SetBoolean("disableGData",
+      !file_types || !file_types->support_gdata);
+
   std::string json_args;
   base::JSONWriter::Write(&arg_value, &json_args);
 
   // kChromeUIFileManagerURL could not be used since query parameters are not
   // supported for it.
   std::string url = GetFileBrowserUrl().spec() +
                     '?' + net::EscapeUrlEncodedData(json_args, false);
   return GURL(url);
 }
 
@@ skipping 409 matching lines @@
           OperationRegistry::ProgressStatus>::const_iterator iter =
               list.begin();
        iter != list.end(); ++iter) {
     result_list->Append(
         ProgessStatusToDictionaryValue(profile, origin_url, *iter));
   }
   return result_list.release();
 }
 
 }  // namespace file_manager_util