Allow platform apps to respond to Web Intents

chrome/common/extensions/api/experimental_app.json

 // 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.
 
 [
   {
     "namespace":"experimental.app",
     "functions": [
       {
         "name": "notify",
@@ skipping 60 matching lines @@
             }
           },
           {
             "type": "function",
             "name": "callback",
             "optional": true,
             "description": "A callback when the function is complete. Any errors will be reported in <a href='extension.html#property-lastError'>chrome.extension.lastError</a>.",
             "parameters": []
           }
         ]
+      },
+      {
+        "name": "postIntentResponse",
+        "type": "function",
+        "description": "Responds to an intent previously sent to a packaged app, identified by intentId. This should be invoked at most once for any intentId.",
+        "nodoc": true,
+        "parameters": [
+          {
+            "type": "object",
+            "name": "details",
+            "properties": {
+              "intentId": {
+                "type": "integer",
+                "optional": false
+              },
+              "success": {
+                "type": "boolean",
+                "optional": false
+              },
+              "data": {
+                "type": "any",
+                "optional": false
+              }
+            }
+          }
+        ]
       }
     ],
     "events": [
       {
         "name": "onLaunched",
         "type": "function",
         "description": "Fired when the app is launched.",
         "parameters": [
           {
             "type": "object",
@@ skipping 27 matching lines @@
                   }
                 }
               }
             }
           }
         ]
       }
     ]
   }
 ]