Pass command line arguments onto platform apps which provide the right intent.

chrome/renderer/resources/extensions/experimental.app_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 experimental.app API.
+
+var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
+var experimentalAppNatives = requireNative('experimental_app');
+var GetIsolatedFileSystem = experimentalAppNatives.GetIsolatedFileSystem;
+
+chromeHidden.registerCustomHook('experimental.app', function(bindingsAPI) {
+  chrome.experimental.app.onLaunched.dispatch =
+      function(launchData, fileSystemId, baseName) {
+    if (launchData) {
+      event = this;
+      fs = GetIsolatedFileSystem(fileSystemId);
+      try {
+        fs.root.getFile(baseName, {}, function(fileEntry) {
+          launchData.intent.data = fileEntry;
+          launchData.intent.postResult = function() {};
+          launchData.intent.postFailure = function() {};
+          chrome.Event.prototype.dispatch.call(event, launchData);
+        }, function(fileError) {
+          console.error('Error getting fileEntry, code: ' + fileError.code);
+          chrome.Event.prototype.dispatch.call(event);
+        });
+      } catch (e) {
+        console.error('Error in event handler for onLaunched: ' + e.stack);
+        chrome.Event.prototype.dispatch.call(event);
+      }
+    } else {
+      chrome.Event.prototype.dispatch.call(this);
+    }
+  };
+});