[Extensions Bindings] Move directory util out of runtime_custom_bindings

extensions/renderer/resources/runtime_custom_bindings.js

 // Copyright 2014 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.
 
 // Custom binding for the runtime API.
 
 var binding = apiBridge || require('binding').Binding.create('runtime');
 
 var messaging = require('messaging');
 var runtimeNatives = requireNative('runtime');
 var messagingNatives = requireNative('messaging_natives');
 var process = requireNative('process');
 var utils = require('utils');
-
-var WINDOW = {};
-try {
-  WINDOW = window;
-} catch (e) {
-  // Running in SW context.
-  // TODO(lazyboy): Synchronous access to background page is not possible from
-  // service worker context. Decide what we should do in this case for the class
-  // of APIs that require access to background page or window object
-}
-
-var backgroundPage = WINDOW;
-var backgroundRequire = require;
-var contextType = process.GetContextType();
-
-if (contextType == 'BLESSED_EXTENSION' ||
-    contextType == 'UNBLESSED_EXTENSION') {
-  var manifest = runtimeNatives.GetManifest();
-  if (manifest.app && manifest.app.background) {
-    // Get the background page if one exists. Otherwise, default to the current
-    // window.
-    backgroundPage = runtimeNatives.GetExtensionViews(-1, -1, 'BACKGROUND')[0];
-    if (backgroundPage) {
-      var GetModuleSystem = requireNative('v8_context').GetModuleSystem;
-      backgroundRequire = GetModuleSystem(backgroundPage).require;
-    } else {
-      backgroundPage = WINDOW;
-    }
-  }
-}
-
-// For packaged apps, all windows use the bindFileEntryCallback from the
-// background page so their FileEntry objects have the background page's context
-// as their own.  This allows them to be used from other windows (including the
-// background page) after the original window is closed.
-if (WINDOW == backgroundPage) {
-  var lastError = require('lastError');
-  var fileSystemNatives = requireNative('file_system_natives');
-  var GetIsolatedFileSystem = fileSystemNatives.GetIsolatedFileSystem;
-  var bindDirectoryEntryCallback = function(functionName, apiFunctions) {
-    apiFunctions.setCustomCallback(functionName,
-        function(name, request, callback, response) {
-      if (callback) {
-        if (!response) {
-          callback();
-          return;
-        }
-        var fileSystemId = response.fileSystemId;
-        var baseName = response.baseName;
-        var fs = GetIsolatedFileSystem(fileSystemId);
-
-        try {
-          fs.root.getDirectory(baseName, {}, callback, function(fileError) {
-            lastError.run('runtime.' + functionName,
-                          'Error getting Entry, code: ' + fileError.code,
-                          request.stack,
-                          callback);
-          });
-        } catch (e) {
-          lastError.run('runtime.' + functionName,
-                        'Error: ' + e.stack,
-                        request.stack,
-                        callback);
-        }
-      }
-    });
-  };
-} else {
-  // Force the runtime API to be loaded in the background page. Using
-  // backgroundPageModuleSystem.require('runtime') is insufficient as
-  // requireNative is only allowed while lazily loading an API.
-  backgroundPage.chrome.runtime;
-  var bindDirectoryEntryCallback =
-      backgroundRequire('runtime').bindDirectoryEntryCallback;
-}
+var getBindDirectoryEntryCallback =
+    require('fileEntryBindingUtil').getBindDirectoryEntryCallback;
 
 binding.registerCustomHook(function(binding, id, contextType) {
   var apiFunctions = binding.apiFunctions;
   var runtime = binding.compiledApi;
 
   //
   // Unprivileged APIs.
   //
 
   if (id != '')
@@ skipping 78 matching lines @@
 
   apiFunctions.setCustomCallback('getBackgroundPage',
                                  function(name, request, callback, response) {
     if (callback) {
       var bg =
           runtimeNatives.GetExtensionViews(-1, -1, 'BACKGROUND')[0] || null;
       callback(bg);
     }
   });
 
-  bindDirectoryEntryCallback('getPackageDirectoryEntry', apiFunctions);
+  apiFunctions.setCustomCallback('getPackageDirectoryEntry',
+                                 getBindDirectoryEntryCallback());
 });
 
-exports.$set('bindDirectoryEntryCallback', bindDirectoryEntryCallback);
 if (!apiBridge)
   exports.$set('binding', binding.generate());