Lazy load chrome.* APIs

chrome/renderer/resources/extensions/runtime_custom_bindings.js

 // 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.
 
 // Custom bindings for the runtime API.
 
+var Bindings = require('schema_binding_generator').Bindings;
+var bindings = new Bindings('runtime');
+
 var runtimeNatives = requireNative('runtime');
 var extensionNatives = requireNative('extension');
 var GetExtensionViews = extensionNatives.GetExtensionViews;
 var OpenChannelToExtension = runtimeNatives.OpenChannelToExtension;
 var OpenChannelToNativeApp = runtimeNatives.OpenChannelToNativeApp;
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 var sendMessageUpdateArguments =
     require('miscellaneous_bindings').sendMessageUpdateArguments;
 
-chromeHidden.registerCustomHook('runtime', function(bindings, id, contextType) {
+bindings.registerCustomHook(function(bindings, id, contextType) {
   var apiFunctions = bindings.apiFunctions;
+  var runtime = bindings.compiledApi;
 
   //
   // Unprivileged APIs.
   //
 
-  chrome.runtime.id = id;
+  runtime.id = id;
 
   apiFunctions.setHandleRequest('getManifest', function() {
     return runtimeNatives.GetManifest();
   });
 
   apiFunctions.setHandleRequest('getURL', function(path) {
     path = String(path);
     if (!path.length || path[0] != '/')
       path = '/' + path;
     return 'chrome-extension://' + id + path;
   });
 
   apiFunctions.setUpdateArgumentsPreValidate('sendMessage',
       sendMessageUpdateArguments.bind(null, 'sendMessage'));
   apiFunctions.setUpdateArgumentsPreValidate('sendNativeMessage',
       sendMessageUpdateArguments.bind(null, 'sendNativeMessage'));
 
   apiFunctions.setHandleRequest('sendMessage',
                                 function(targetId, message, responseCallback) {
-    var port = chrome.runtime.connect(targetId || chrome.runtime.id,
+    var port = runtime.connect(targetId || runtime.id,
         {name: chromeHidden.kMessageChannel});
     chromeHidden.Port.sendMessageImpl(port, message, responseCallback);
   });
 
   apiFunctions.setHandleRequest('sendNativeMessage',
                                 function(targetId, message, responseCallback) {
-    var port = chrome.runtime.connectNative(
+    var port = runtime.connectNative(
         targetId, message, chromeHidden.kNativeMessageChannel);
     chromeHidden.Port.sendMessageImpl(port, '', responseCallback);
   });
 
   apiFunctions.setUpdateArgumentsPreValidate('connect', function() {
     // Align missing (optional) function arguments with the arguments that
     // schema validation is expecting, e.g.
     //   runtime.connect()   -> runtime.connect(null, null)
     //   runtime.connect({}) -> runtime.connect(null, {})
     var nextArg = 0;
@@ skipping 27 matching lines @@
     if (typeof(arguments[nextArg]) == 'string')
       channelName = arguments[nextArg++];
 
     if (nextArg != arguments.length)
       throw new Error('Invalid arguments to connectNative.');
     return [appName, {name: channelName, message: connectMessage}];
   });
 
   apiFunctions.setHandleRequest('connect', function(targetId, connectInfo) {
     if (!targetId)
-      targetId = chrome.runtime.id;
+      targetId = runtime.id;
     var name = '';
     if (connectInfo && connectInfo.name)
       name = connectInfo.name;
 
-    var portId = OpenChannelToExtension(chrome.runtime.id, targetId, name);
+    var portId = OpenChannelToExtension(runtime.id, targetId, name);
     if (portId >= 0)
       return chromeHidden.Port.createPort(portId, name);
     throw new Error('Error connecting to extension ' + targetId);
   });
 
   //
   // Privileged APIs.
   //
   if (contextType != 'BLESSED_EXTENSION')
     return;
 
   apiFunctions.setHandleRequest('connectNative',
                                 function(nativeAppName, connectInfo) {
     // Turn the object into a string here, because it eventually will be.
-    var portId = OpenChannelToNativeApp(chrome.runtime.id,
+    var portId = OpenChannelToNativeApp(runtime.id,
                                         nativeAppName,
                                         connectInfo.name,
                                         JSON.stringify(connectInfo.message));
     if (portId >= 0) {
       return chromeHidden.Port.createPort(portId, connectInfo.name);
     }
     throw new Error('Error connecting to native app: ' + nativeAppName);
   });
 
   apiFunctions.setCustomCallback('getBackgroundPage',
                                  function(name, request, response) {
     if (request.callback) {
       var bg = GetExtensionViews(-1, 'BACKGROUND')[0] || null;
       request.callback(bg);
     }
     request.callback = null;
   });
 
 });
+
+exports.bindings = bindings.generate();