Support getEntryId for entries passed to apps as launch data.

chrome/renderer/resources/extensions/app_runtime_custom_bindings.js

 // 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.
 
 // Custom binding for the chrome.app.runtime API.
 
 var binding = require('binding').Binding.create('app.runtime');
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 var chrome = requireNative('chrome').GetChrome();
@@ skipping 56 matching lines @@
           dispatch([]);
         } else {
           var data = { id: launchData.id, items: items };
           dispatch([data]);
         }
       }
     };
     forEach(launchData.items, function(i, item) {
       var fs = GetIsolatedFileSystem(item.fileSystemId);
       fs.root.getFile(item.baseName, {}, function(fileEntry) {
+        entryIdManager.registerEntry(item.entryId, fileEntry);
         itemLoaded(null, { entry: fileEntry, type: item.mimeType });
       }, function(fileError) {
         itemLoaded(fileError);
       });
     });
   } else if (launchData) {
     dispatch([launchData]);
   } else {
     dispatch([]);
   }
 });
 
 exports.binding = binding.generate();