Allow platform apps to respond to Web Intents

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 bindings for the chrome.app.runtime API.
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 var fileSystemHelpers = requireNative('file_system_natives');
 var GetIsolatedFileSystem = fileSystemHelpers.GetIsolatedFileSystem;
 var appNatives = requireNative('app_runtime');
 var DeserializeString = appNatives.DeserializeString;
+var SerializeToString = appNatives.SerializeToString;
 var CreateBlob = appNatives.CreateBlob;
 
 chromeHidden.Event.registerArgumentMassager('app.runtime.onLaunched',
     function(args, dispatch) {
   var launchData = args[0];
   var intentData = args[1];
+  var intentId = args[2];
+
+  if (launchData) {
+    if (intentId) {
+      var fn = function(success, data) {
+        chrome.app.runtime.postIntentResponse({
+          'intentId': intentId,
+          'success': success,
+          'data': SerializeToString(data)
+        });
+      };
+      launchData.intent.postResult = fn.bind(undefined, true);
+      launchData.intent.postFailure = fn.bind(undefined, false);
+    } else {
+      launchData.intent.postResult = function() {};
+      launchData.intent.postFailure = function() {};
+    }
+  }
 
   if (launchData && intentData) {
     switch(intentData.format) {
       case('fileEntry'):
         var fs = GetIsolatedFileSystem(intentData.fileSystemId);
         try {
           fs.root.getFile(intentData.baseName, {}, function(fileEntry) {
             launchData.intent.data = fileEntry;
-            launchData.intent.postResult = function() {};
-            launchData.intent.postFailure = function() {};
             dispatch([launchData]);
           }, function(fileError) {
             console.error('Error getting fileEntry, code: ' + fileError.code);
             dispatch([]);
           });
         } catch (e) {
           console.error('Error in event handler for onLaunched: ' + e.stack);
           dispatch([]);
         }
         break;
       case('filesystem'):
         launchData.intent.data = GetIsolatedFileSystem(intentData.fileSystemId,
                                                        intentData.baseName);
         launchData.intent.postResult = function() {};
         launchData.intent.postFailure = function() {};
         dispatch([launchData]);
         break;
       case('serialized'):
         var deserializedData = DeserializeString(intentData.data);
         launchData.intent.data = deserializedData;
-        launchData.intent.postResult = function() {};
-        launchData.intent.postFailure = function() {};
         dispatch([launchData]);
         break;
       case('blob'):
         var blobData = CreateBlob(intentData.blobFilePath,
                                   intentData.blobLength);
         launchData.intent.data = blobData;
-        launchData.intent.postResult = function() {};
-        launchData.intent.postFailure = function() {};
         dispatch([launchData]);
         break;
       default:
         console.error('Unexpected launch data format');
         dispatch([]);
     }
   } else if (launchData) {
     dispatch([launchData]);
   } else {
     dispatch([]);
   }
 });