Add a flag that lets the webstore show a different UI on app install.

chrome/test/data/extensions/api_test/webstore_private/app_install_bubble.js

Index: chrome/test/data/extensions/api_test/webstore_private/app_install_bubble.js
diff --git a/chrome/test/data/extensions/api_test/webstore_private/app_install_bubble.js b/chrome/test/data/extensions/api_test/webstore_private/app_install_bubble.js
new file mode 100644
index 0000000000000000000000000000000000000000..5f32a856620f2cdea1da2d20346da54f2ffa46d3
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/webstore_private/app_install_bubble.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2011 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.
+
+var tests = [
+  function appInstallBubble() {
+    // See things through all the way to a successful install.
+    listenOnce(chrome.management.onInstalled, callbackPass(function(info) {
+      assertEq(info.id, appId);
+    }));
+
+    var manifest = getManifest("app/manifest.json");
+    // Begin installing.
+    chrome.webstorePrivate.beginInstallWithManifest2(
+        {'id': appId,'manifest': manifest, 'appInstallBubble':true},
+        function(result) {

[Matt Perry, 2011/08/03 22:19:26]

I think you want to wrap this callback in a callbackPass.

[asargent_no_longer_on_chrome, 2011/08/04 00:00:16]

Good catch, done. (I also removed the assertNoLastError because callbackPass
does that for me.)

+      assertNoLastError();
+      assertEq(result, "");
+
+      // Now complete the installation.
+      chrome.webstorePrivate.completeInstall(appId, callbackPass());
+    });
+  }
+];
+
+runTests(tests);