Add the "file_handlers" manifest key for platform apps to replace "intents".

chrome/test/data/extensions/platform_apps/launch_wrong_type/manifest.json

 {
   "name": "Platform App Launch Test",
   "version": "1",
-  "intents": {
-    "http://webintents.org/view": {
-      "type": [
+  "file_handlers": {
+    "image": {
+      "types": [
         "image/*"
       ],
       "title": "Test editor"
     }
   },
   "app": {
     "background": {
       "scripts": ["test.js"]
     }
   }
 }