Add support for My Maps maps in Chrome OS Drive integration.

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

 // Copyright 2013 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/private_api_strings.h"
 
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
 #include "chrome/browser/chromeos/file_manager/open_with_browser.h"
 #include "chrome/grit/generated_resources.h"
@@ skipping 411 matching lines @@
   SET_STRING("GSHEET_DOCUMENT_FILE_TYPE",
              IDS_FILE_BROWSER_GSHEET_DOCUMENT_FILE_TYPE);
   SET_STRING("GSLIDES_DOCUMENT_FILE_TYPE",
              IDS_FILE_BROWSER_GSLIDES_DOCUMENT_FILE_TYPE);
   SET_STRING("GDRAW_DOCUMENT_FILE_TYPE",
              IDS_FILE_BROWSER_GDRAW_DOCUMENT_FILE_TYPE);
   SET_STRING("GTABLE_DOCUMENT_FILE_TYPE",
              IDS_FILE_BROWSER_GTABLE_DOCUMENT_FILE_TYPE);
   SET_STRING("GFORM_DOCUMENT_FILE_TYPE",
              IDS_FILE_BROWSER_GFORM_DOCUMENT_FILE_TYPE);
+  SET_STRING("GMAP_DOCUMENT_FILE_TYPE",
+             IDS_FILE_BROWSER_GMAP_DOCUMENT_FILE_TYPE);
   SET_STRING("GLINK_DOCUMENT_FILE_TYPE",
              IDS_FILE_BROWSER_GLINK_DOCUMENT_FILE_TYPE);
 
   SET_STRING("DRIVE_LOADING", IDS_FILE_BROWSER_DRIVE_LOADING);
   SET_STRING("DRIVE_CANNOT_REACH", IDS_FILE_BROWSER_DRIVE_CANNOT_REACH);
   SET_STRING("DRIVE_LEARN_MORE", IDS_FILE_BROWSER_DRIVE_LEARN_MORE);
 
   SET_STRING("AUDIO_PLAYER_TITLE", IDS_FILE_BROWSER_AUDIO_PLAYER_TITLE);
   SET_STRING("AUDIO_PLAYER_DEFAULT_ARTIST",
              IDS_FILE_BROWSER_AUDIO_PLAYER_DEFAULT_ARTIST);
@@ skipping 114 matching lines @@
   dict->SetString(
       "GOOGLE_DRIVE_ERROR_HELP_URL",
       base::StringPrintf(kHelpURLFormat, kGoogleDriveErrorHelpNumber));
   dict->SetString(
       "NO_ACTION_FOR_FILE_URL",
       base::StringPrintf(kHelpURLFormat, kNoActionForFileHelpNumber));
   return true;
 }
 
 }  // namespace extensions