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

chrome/test/data/extensions/platform_apps/launch_file/test.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.
+
+// Test that there is a launchData.intent, it is set up proerly, and that the
+// FileEntry in launchData.intent.data can be read.
+function onLaunched(launchData) {
+  chrome.test.runTests([
+    function testIntent() {
+      chrome.test.assertFalse(!launchData, "No launchData");
+      chrome.test.assertFalse(!launchData.intent, "No launchData.intent");
+      chrome.test.assertEq(launchData.intent.action,
+          "http://webintents.org/view");
+      chrome.test.assertEq(launchData.intent.type,
+          "chrome-extension://fileentry");
+      chrome.test.assertFalse(!launchData.intent.data,
+          "No launchData.intent.data");
+
+      launchData.intent.data.file(function(file) {
+        var reader = new FileReader();
+        reader.onloadend = function(e) {
+          chrome.test.assertEq(
+              reader.result.indexOf("This is a test. Word."), 0);
+          chrome.test.succeed();
+        };
+        reader.onerror = function(e) {
+          chrome.test.fail("Error reading file contents.");
+        };
+        reader.readAsText(file);
+      });
+    }
+  ]);
+}
+
+chrome.experimental.app.onLaunched.addListener(onLaunched);