[cros] disable GDrive option on certain file pickers

chrome/browser/ui/views/select_file_dialog_extension.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/ui/views/select_file_dialog_extension.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
@@ skipping 318 matching lines @@
     virtual_path = default_dialog_path.BaseName();
   }
 
   has_multiple_file_type_choices_ =
       file_types ? file_types->extensions.size() > 1 : true;
 
   GURL file_browser_url = file_manager_util::GetFileBrowserUrlWithParams(
       type, title, virtual_path, file_types, file_type_index,
       default_extension);
 
-ExtensionDialog* dialog = ExtensionDialog::Show(file_browser_url,
+  ExtensionDialog* dialog = ExtensionDialog::Show(file_browser_url,
       base_window, profile_, tab->web_contents(),
       kFileManagerWidth, kFileManagerHeight,
 #if defined(USE_AURA)
       file_manager_util::GetTitleFromType(type),
 #else
       // HTML-based header used.
       string16(),
 #endif
       this /* ExtensionDialog::Observer */);
   if (!dialog) {
     LOG(ERROR) << "Unable to create extension dialog";
     return;
   }
 
   dialog->SetMinimumContentsSize(kFileManagerMinimumWidth,
                                  kFileManagerMinimumHeight);
 
   // Connect our listener to FileDialogFunction's per-tab callbacks.
   AddPending(tab_id);
 
   extension_dialog_ = dialog;
   params_ = params;
   tab_id_ = tab_id;
   owner_window_ = owner_window;
 }