Re-open DevTools windows for PackagedApps if they are reloaded with DevTools open.

chrome/test/data/extensions/platform_apps/minimal_id/test.js

Index: chrome/test/data/extensions/platform_apps/minimal_id/test.js
diff --git a/chrome/test/data/extensions/platform_apps/browser_tag_src_attribute/test.js b/chrome/test/data/extensions/platform_apps/minimal_id/test.js
similarity index 63%
copy from chrome/test/data/extensions/platform_apps/browser_tag_src_attribute/test.js
copy to chrome/test/data/extensions/platform_apps/minimal_id/test.js
index 3d6bffa025e94fb420236e37722514cdce3353d1..57aecb4d23b6e6f5259287bc770b3c3ed31e9aac 100644
--- a/chrome/test/data/extensions/platform_apps/browser_tag_src_attribute/test.js
+++ b/chrome/test/data/extensions/platform_apps/minimal_id/test.js
@@ -3,5 +3,7 @@
 // found in the LICENSE file.
 
 chrome.app.runtime.onLaunched.addListener(function() {
-  chrome.app.window.create('main.html', {}, function () {});
+  chrome.app.window.create('main.html',
+                           {id: 'minimal_id'},
+                           function () {});
 });