Rename FileSystemMountPointProvider::ValidateFileSystemRoot to OpenFileSystem

chrome/browser/chromeos/extensions/file_manager/file_browser_handler_api.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.
 
 // The file contains the implementation of
 // fileBrowserHandlerInternal.selectFile extension function.
 // When invoked, the function does the following:
 //  - Verifies that the extension function was invoked as a result of user
 //    gesture.
 //  - Display 'save as' dialog using FileSelectorImpl which waits for the user
@@ skipping 321 matching lines @@
     return;
   }
 
   full_path_ = full_path;
 
   // We have to open file system in order to create a FileEntry object for the
   // selected file path.
   content::SiteInstance* site_instance = render_view_host()->GetSiteInstance();
   BrowserContext::GetStoragePartition(profile_, site_instance)->
       GetFileSystemContext()->OpenFileSystem(
-          source_url_.GetOrigin(), fileapi::kFileSystemTypeExternal, false,
+          source_url_.GetOrigin(), fileapi::kFileSystemTypeExternal,
+          fileapi::OPEN_FILE_SYSTEM_FAIL_IF_NONEXISTENT,
           base::Bind(
               &RunOpenFileSystemCallback,
               base::Bind(&FileBrowserHandlerInternalSelectFileFunction::
                              OnFileSystemOpened,
                          this)));
 };
 
 void FileBrowserHandlerInternalSelectFileFunction::OnFileSystemOpened(
     bool success,
     const std::string& file_system_name,
@@ skipping 47 matching lines @@
     result->entry.reset(new FileEntryInfo());
     result->entry->file_system_name = file_system_name_;
     result->entry->file_system_root = file_system_root_.spec();
     result->entry->file_full_path = "/" + virtual_path_.value();
     result->entry->file_is_directory = false;
   }
 
   results_ = SelectFile::Results::Create(*result);
   SendResponse(true);
 }