arc: Restore Chrome badging for apps that have peer in Android apps.

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

Index: chrome/test/data/extensions/platform_apps/app_icon/test.js
diff --git a/chrome/test/data/extensions/platform_apps/app_icon/test.js b/chrome/test/data/extensions/platform_apps/app_icon/test.js
index afb3eb88534d73078af11a162ec4e45fcc7618cd..3b3887a44de97bd77798c27b9a0e74fd15b31709 100644
--- a/chrome/test/data/extensions/platform_apps/app_icon/test.js
+++ b/chrome/test/data/extensions/platform_apps/app_icon/test.js
@@ -15,7 +15,16 @@ chrome.app.runtime.onLaunched.addListener(function() {
       chrome.app.window.create(
         'main.html', { type: "shell" },
         function (win) {
-          chrome.test.sendMessage("Completed");
+          // Create the shell window which is shown in shelf; it should use
+          // another custom app icon.
+          chrome.app.window.create(
+            'main.html', { id: "win_with_icon",
+                           type: "shell",
+                           icon: "icon48.png",

[msw, 2017/04/06 19:22:29]

q: what's the difference between |win.setIcon("...")" and using this |icon:
"..."| init?

[khmel, 2017/04/06 20:10:40]

It is equivalent, can be used after creation. Also realized that checking
window_icon_url_ is not enough we also should check app_icon_url_. Introduced
HasCustomIcon.

+                           showInShelf: true },
+            function (win) {
+              chrome.test.sendMessage("Completed");
+            });
         });
     });
 });