chrome.displaySource custom bindings

extensions/renderer/resources/display_source_custom_bindings.js

+// Copyright 2015 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.
+
+// Custom binding for the Display Source API.
+
+var binding = require('binding').Binding.create('displaySource');
+var chrome = requireNative('chrome').GetChrome();
+var lastError = require('lastError');
+var natives = requireNative('display_source');
+
+binding.registerCustomHook(function(bindingsAPI, extensionId) {
+  var apiFunctions = bindingsAPI.apiFunctions;
+  apiFunctions.setHandleRequest('startSession',
+      function(sessionInfo, callback) {
+        try {
+          natives.StartSession(sessionInfo);
+        } catch (e) {
+          lastError.set('displaySource.startSession', e.message, null, chrome);
+        } finally {
+           if (callback !== undefined)
+             callback();
+           lastError.clear(chrome);
+        }
+  });
+  apiFunctions.setHandleRequest('terminateSession',
+      function(sink_id, callback) {
+        try {
+          natives.TerminateSession(sink_id);
+        } catch (e) {
+          lastError.set(
+              'displaySource.terminateSession', e.message, null, chrome);
+        } finally {
+           if (callback !== undefined)
+             callback();
+           lastError.clear(chrome);
+        }
+  });
+});
+
+exports.$set('binding', binding.generate());