[Extensions] Don't allow built-in extensions code to be overridden

BUG=546677

Review URL: https://codereview.chromium.org/1417513003

Cr-Commit-Position: refs/heads/master@{#356654}

48 files changed, 101 insertions, 98 deletions

diff --git a/extensions/renderer/resources/app_runtime_custom_bindings.js b/extensions/renderer/resources/app_runtime_custom_bindings.js
index 2b492c5..0364b66 100644
--- a/extensions/renderer/resources/app_runtime_custom_bindings.js
+++ b/extensions/renderer/resources/app_runtime_custom_bindings.js
@@ -71,4 +71,4 @@ eventBindings.registerArgumentMassager('app.runtime.onLaunched',
   }
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/app_window_custom_bindings.js b/extensions/renderer/resources/app_window_custom_bindings.js
index cb44642..63f1eae 100644
--- a/extensions/renderer/resources/app_window_custom_bindings.js
+++ b/extensions/renderer/resources/app_window_custom_bindings.js
@@ -404,7 +404,7 @@ function updateSizeConstraints(boundsType, constraints) {
   currentWindowInternal.setSizeConstraints(boundsType, constraints);
 }
 
-exports.binding = appWindow.generate();
-exports.onAppWindowClosed = onAppWindowClosed;
-exports.updateAppWindowProperties = updateAppWindowProperties;
-exports.appWindowShownForTests = onAppWindowShownForTests;
+exports.$set('binding', appWindow.generate());
+exports.$set('onAppWindowClosed', onAppWindowClosed);
+exports.$set('updateAppWindowProperties', updateAppWindowProperties);
+exports.$set('appWindowShownForTests', onAppWindowShownForTests);
diff --git a/extensions/renderer/resources/binding.js b/extensions/renderer/resources/binding.js
index cf671cb..d40b18f 100644
--- a/extensions/renderer/resources/binding.js
+++ b/extensions/renderer/resources/binding.js
@@ -524,4 +524,4 @@ Binding.prototype = {
   }
 };
 
-exports.Binding = Binding;
+exports.$set('Binding', Binding);
diff --git a/extensions/renderer/resources/browser_test_environment_specific_bindings.js b/extensions/renderer/resources/browser_test_environment_specific_bindings.js
index f540862..8574068 100644
--- a/extensions/renderer/resources/browser_test_environment_specific_bindings.js
+++ b/extensions/renderer/resources/browser_test_environment_specific_bindings.js
@@ -11,5 +11,5 @@ function testDone(runNextTest) {
   setTimeout(runNextTest, 0);
 }
 
-exports.registerHooks = registerHooks;
-exports.testDone = testDone;
+exports.$set('registerHooks', registerHooks);
+exports.$set('testDone', testDone);
diff --git a/extensions/renderer/resources/context_menus_custom_bindings.js b/extensions/renderer/resources/context_menus_custom_bindings.js
index fe5cec9..ec8080f 100644
--- a/extensions/renderer/resources/context_menus_custom_bindings.js
+++ b/extensions/renderer/resources/context_menus_custom_bindings.js
@@ -23,4 +23,4 @@ binding.registerCustomHook(function(bindingsAPI) {
   apiFunctions.setCustomCallback('removeAll', handlers.callbacks.removeAll);
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/context_menus_handlers.js b/extensions/renderer/resources/context_menus_handlers.js
index b334900..aef6889 100644
--- a/extensions/renderer/resources/context_menus_handlers.js
+++ b/extensions/renderer/resources/context_menus_handlers.js
@@ -138,4 +138,4 @@ function createContextMenusHandlers(isWebview) {
   };
 }
 
-exports.create = createContextMenusHandlers;
+exports.$set('create', createContextMenusHandlers);
diff --git a/extensions/renderer/resources/declarative_webrequest_custom_bindings.js b/extensions/renderer/resources/declarative_webrequest_custom_bindings.js
index 641b782..e9da12b 100644
--- a/extensions/renderer/resources/declarative_webrequest_custom_bindings.js
+++ b/extensions/renderer/resources/declarative_webrequest_custom_bindings.js
@@ -93,4 +93,4 @@ binding.registerCustomHook(function(api) {
   };
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/entry_id_manager.js b/extensions/renderer/resources/entry_id_manager.js
index 9fc2c14..8e23942 100644
--- a/extensions/renderer/resources/entry_id_manager.js
+++ b/extensions/renderer/resources/entry_id_manager.js
@@ -47,6 +47,6 @@ function getEntryById(id) {
   return idsToEntries[id];
 }
 
-exports.registerEntry = registerEntry;
-exports.getEntryId = getEntryId;
-exports.getEntryById = getEntryById;
+exports.$set('registerEntry', registerEntry);
+exports.$set('getEntryId', getEntryId);
+exports.$set('getEntryById', getEntryById);
diff --git a/extensions/renderer/resources/event.js b/extensions/renderer/resources/event.js
index bb71297..5f0b912 100644
--- a/extensions/renderer/resources/event.js
+++ b/extensions/renderer/resources/event.js
@@ -503,8 +503,8 @@
   ] });
 
   // NOTE: Event is (lazily) exposed as chrome.Event from dispatcher.cc.
-  exports.Event = Event;
+  exports.$set('Event', Event);
 
-  exports.dispatchEvent = dispatchEvent;
-  exports.parseEventOptions = parseEventOptions;
-  exports.registerArgumentMassager = registerArgumentMassager;
+  exports.$set('dispatchEvent', dispatchEvent);
+  exports.$set('parseEventOptions', parseEventOptions);
+  exports.$set('registerArgumentMassager', registerArgumentMassager);
diff --git a/extensions/renderer/resources/extension_custom_bindings.js b/extensions/renderer/resources/extension_custom_bindings.js
index 155b762..68450d5 100644
--- a/extensions/renderer/resources/extension_custom_bindings.js
+++ b/extensions/renderer/resources/extension_custom_bindings.js
@@ -108,4 +108,4 @@ binding.registerCustomHook(function(bindingsAPI, extensionId) {
   }
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/guest_view/extension_options/extension_options.js b/extensions/renderer/resources/guest_view/extension_options/extension_options.js
index 7193607..70e1158 100644
--- a/extensions/renderer/resources/guest_view/extension_options/extension_options.js
+++ b/extensions/renderer/resources/guest_view/extension_options/extension_options.js
@@ -49,4 +49,4 @@ ExtensionOptionsImpl.prototype.createGuest = function() {
 GuestViewContainer.registerElement(ExtensionOptionsImpl);
 
 // Exports.
-exports.ExtensionOptionsImpl = ExtensionOptionsImpl;
+exports.$set('ExtensionOptionsImpl', ExtensionOptionsImpl);
diff --git a/extensions/renderer/resources/guest_view/extension_options/extension_options_constants.js b/extensions/renderer/resources/guest_view/extension_options/extension_options_constants.js
index f9b29ae..c4d9692 100644
--- a/extensions/renderer/resources/guest_view/extension_options/extension_options_constants.js
+++ b/extensions/renderer/resources/guest_view/extension_options/extension_options_constants.js
@@ -10,4 +10,5 @@ var ExtensionOptionsConstants = {
   ATTRIBUTE_EXTENSION: 'extension'
 };
 
-exports.ExtensionOptionsConstants = $Object.freeze(ExtensionOptionsConstants);
+exports.$set('ExtensionOptionsConstants',
+             $Object.freeze(ExtensionOptionsConstants));
diff --git a/extensions/renderer/resources/guest_view/extension_options/extension_options_events.js b/extensions/renderer/resources/guest_view/extension_options/extension_options_events.js
index 590d48a..20a2f1f 100644
--- a/extensions/renderer/resources/guest_view/extension_options/extension_options_events.js
+++ b/extensions/renderer/resources/guest_view/extension_options/extension_options_events.js
@@ -37,4 +37,4 @@ ExtensionOptionsEvents.prototype.getEvents = function() {
 };
 
 // Exports.
-exports.ExtensionOptionsEvents = ExtensionOptionsEvents;
+exports.$set('ExtensionOptionsEvents', ExtensionOptionsEvents);
diff --git a/extensions/renderer/resources/guest_view/extension_view/extension_view.js b/extensions/renderer/resources/guest_view/extension_view/extension_view.js
index 7858e81..763b554 100644
--- a/extensions/renderer/resources/guest_view/extension_view/extension_view.js
+++ b/extensions/renderer/resources/guest_view/extension_view/extension_view.js
@@ -136,4 +136,4 @@ ExtensionViewImpl.prototype.loadNextSrc = function() {
 GuestViewContainer.registerElement(ExtensionViewImpl);
 
 // Exports.
-exports.ExtensionViewImpl = ExtensionViewImpl;
+exports.$set('ExtensionViewImpl', ExtensionViewImpl);
diff --git a/extensions/renderer/resources/guest_view/extension_view/extension_view_constants.js b/extensions/renderer/resources/guest_view/extension_view/extension_view_constants.js
index b8f0969..80934cf 100644
--- a/extensions/renderer/resources/guest_view/extension_view/extension_view_constants.js
+++ b/extensions/renderer/resources/guest_view/extension_view/extension_view_constants.js
@@ -11,4 +11,4 @@ var ExtensionViewConstants = {
   ATTRIBUTE_SRC: 'src',
 };
 
-exports.ExtensionViewConstants = $Object.freeze(ExtensionViewConstants);
+exports.$set('ExtensionViewConstants', $Object.freeze(ExtensionViewConstants));
diff --git a/extensions/renderer/resources/guest_view/extension_view/extension_view_events.js b/extensions/renderer/resources/guest_view/extension_view/extension_view_events.js
index 901085b..db67418 100644
--- a/extensions/renderer/resources/guest_view/extension_view/extension_view_events.js
+++ b/extensions/renderer/resources/guest_view/extension_view/extension_view_events.js
@@ -29,4 +29,4 @@ ExtensionViewEvents.prototype.handleLoadCommitEvent = function(event) {
   this.view.onLoadCommit(event.url);
 };
 
-exports.ExtensionViewEvents = ExtensionViewEvents;
+exports.$set('ExtensionViewEvents', ExtensionViewEvents);
diff --git a/extensions/renderer/resources/guest_view/extension_view/extension_view_internal.js b/extensions/renderer/resources/guest_view/extension_view/extension_view_internal.js
index a87ee76..07c6dde 100644
--- a/extensions/renderer/resources/guest_view/extension_view/extension_view_internal.js
+++ b/extensions/renderer/resources/guest_view/extension_view/extension_view_internal.js
@@ -2,5 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-exports.ExtensionViewInternal =
-    require('binding').Binding.create('extensionViewInternal').generate();
+exports.$set(
+    'ExtensionViewInternal',
+    require('binding').Binding.create('extensionViewInternal').generate());
diff --git a/extensions/renderer/resources/guest_view/guest_view.js b/extensions/renderer/resources/guest_view/guest_view.js
index 66d48a2..1f887a7 100644
--- a/extensions/renderer/resources/guest_view/guest_view.js
+++ b/extensions/renderer/resources/guest_view/guest_view.js
@@ -350,6 +350,6 @@ GuestView.prototype.getId = function() {
 };
 
 // Exports
-exports.GuestView = GuestView;
-exports.GuestViewImpl = GuestViewImpl;
-exports.ResizeEvent = ResizeEvent;
+exports.$set('GuestView', GuestView);
+exports.$set('GuestViewImpl', GuestViewImpl);
+exports.$set('ResizeEvent', ResizeEvent);
diff --git a/extensions/renderer/resources/guest_view/guest_view_attributes.js b/extensions/renderer/resources/guest_view/guest_view_attributes.js
index 7bc33b8..6c7f711 100644
--- a/extensions/renderer/resources/guest_view/guest_view_attributes.js
+++ b/extensions/renderer/resources/guest_view/guest_view_attributes.js
@@ -139,4 +139,4 @@ var GuestViewAttributes = {
 };
 
 // Exports.
-exports.GuestViewAttributes = GuestViewAttributes;
+exports.$set('GuestViewAttributes', GuestViewAttributes);
diff --git a/extensions/renderer/resources/guest_view/guest_view_container.js b/extensions/renderer/resources/guest_view/guest_view_container.js
index 3e471d4..5e1aac9 100644
--- a/extensions/renderer/resources/guest_view/guest_view_container.js
+++ b/extensions/renderer/resources/guest_view/guest_view_container.js
@@ -306,4 +306,4 @@ function registerGuestViewElement(guestViewContainerType) {
 }
 
 // Exports.
-exports.GuestViewContainer = GuestViewContainer;
+exports.$set('GuestViewContainer', GuestViewContainer);
diff --git a/extensions/renderer/resources/guest_view/guest_view_events.js b/extensions/renderer/resources/guest_view/guest_view_events.js
index fda0db1..e3ccde1 100644
--- a/extensions/renderer/resources/guest_view/guest_view_events.js
+++ b/extensions/renderer/resources/guest_view/guest_view_events.js
@@ -174,5 +174,5 @@ GuestViewEvents.prototype.weakWrapper = function(func) {
 GuestViewEvents.prototype.getEvents = function() { return {}; };
 
 // Exports.
-exports.GuestViewEvents = GuestViewEvents;
-exports.CreateEvent = CreateEvent;
+exports.$set('GuestViewEvents', GuestViewEvents);
+exports.$set('CreateEvent', CreateEvent);
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view.js b/extensions/renderer/resources/guest_view/web_view/web_view.js
index 6fcf028..6dd4fae 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view.js
@@ -223,4 +223,4 @@ WebViewImpl.prototype.maybeSetupContextMenus = function() {};
 GuestViewContainer.registerElement(WebViewImpl);
 
 // Exports.
-exports.WebViewImpl = WebViewImpl;
+exports.$set('WebViewImpl', WebViewImpl);
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view_action_requests.js b/extensions/renderer/resources/guest_view/web_view/web_view_action_requests.js
index c3cc28e..5f4bf2c 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view_action_requests.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view_action_requests.js
@@ -293,4 +293,4 @@ var WebViewActionRequests = {
 };
 
 // Exports.
-exports.WebViewActionRequests = WebViewActionRequests;
+exports.$set('WebViewActionRequests', WebViewActionRequests);
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view_constants.js b/extensions/renderer/resources/guest_view/web_view/web_view_constants.js
index 528a6fc..09110e1 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view_constants.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view_constants.js
@@ -37,4 +37,4 @@ var WebViewConstants = {
       'The permission request for "%1" has been denied.'
 };
 
-exports.WebViewConstants = $Object.freeze(WebViewConstants);
+exports.$set('WebViewConstants', $Object.freeze(WebViewConstants));
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view_events.js b/extensions/renderer/resources/guest_view/web_view/web_view_events.js
index 6dbb16b..1077684 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view_events.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view_events.js
@@ -298,4 +298,4 @@ function DeclarativeWebRequestEvent(opt_eventName,
 DeclarativeWebRequestEvent.prototype.__proto__ = EventBindings.Event.prototype;
 
 // Exports.
-exports.WebViewEvents = WebViewEvents;
+exports.$set('WebViewEvents', WebViewEvents);
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view_internal.js b/extensions/renderer/resources/guest_view/web_view/web_view_internal.js
index 03ede9bc..4d2c36c 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view_internal.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view_internal.js
@@ -2,5 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-exports.WebViewInternal =
-    require('binding').Binding.create('webViewInternal').generate();
+exports.$set(
+    'WebViewInternal',
+    require('binding').Binding.create('webViewInternal').generate());
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view_request_custom_bindings.js b/extensions/renderer/resources/guest_view/web_view/web_view_request_custom_bindings.js
index 62f7459..61b553b 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view_request_custom_bindings.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view_request_custom_bindings.js
@@ -52,4 +52,4 @@ binding.registerCustomHook(function(api) {
   }
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/i18n_custom_bindings.js b/extensions/renderer/resources/i18n_custom_bindings.js
index 4ee5206..de69fa2 100644
--- a/extensions/renderer/resources/i18n_custom_bindings.js
+++ b/extensions/renderer/resources/i18n_custom_bindings.js
@@ -46,4 +46,4 @@ binding.registerCustomHook(function(bindingsAPI, extensionId) {
   });
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/image_util.js b/extensions/renderer/resources/image_util.js
index b6cd1b1..a7a27a6 100644
--- a/extensions/renderer/resources/image_util.js
+++ b/extensions/renderer/resources/image_util.js
@@ -78,5 +78,5 @@ function loadAllImages(imageSpecs, callbacks) {
   }
 }
 
-exports.loadImageData = loadImageData;
-exports.loadAllImages = loadAllImages;
+exports.$set('loadImageData', loadImageData);
+exports.$set('loadAllImages', loadAllImages);
diff --git a/extensions/renderer/resources/json_schema.js b/extensions/renderer/resources/json_schema.js
index 147dd67..135b0ee 100644
--- a/extensions/renderer/resources/json_schema.js
+++ b/extensions/renderer/resources/json_schema.js
@@ -522,4 +522,4 @@ JSONSchemaValidator.prototype.resetErrors = function() {
   this.errors = [];
 };
 
-exports.JSONSchemaValidator = JSONSchemaValidator;
+exports.$set('JSONSchemaValidator', JSONSchemaValidator);
diff --git a/extensions/renderer/resources/last_error.js b/extensions/renderer/resources/last_error.js
index 9b5b3c0..a205ab3 100644
--- a/extensions/renderer/resources/last_error.js
+++ b/extensions/renderer/resources/last_error.js
@@ -134,9 +134,9 @@ function reportIfUnchecked(name, targetChrome, stack) {
       (name || "unknown") + ": " + message + (stack ? "\n" + stack : ""));
 }
 
-exports.clear = clear;
-exports.hasAccessed = hasAccessed;
-exports.hasError = hasError;
-exports.set = set;
-exports.run = run;
-exports.reportIfUnchecked = reportIfUnchecked;
+exports.$set('clear', clear);
+exports.$set('hasAccessed', hasAccessed);
+exports.$set('hasError', hasError);
+exports.$set('set', set);
+exports.$set('run', run);
+exports.$set('reportIfUnchecked', reportIfUnchecked);
diff --git a/extensions/renderer/resources/messaging.js b/extensions/renderer/resources/messaging.js
index 5fe9920..5a7ec1e 100644
--- a/extensions/renderer/resources/messaging.js
+++ b/extensions/renderer/resources/messaging.js
@@ -377,16 +377,16 @@ var Port = utils.expose('Port', PortImpl, { functions: [
     'onMessage'
   ] });
 
-exports.kRequestChannel = kRequestChannel;
-exports.kMessageChannel = kMessageChannel;
-exports.kNativeMessageChannel = kNativeMessageChannel;
-exports.Port = Port;
-exports.createPort = createPort;
-exports.sendMessageImpl = sendMessageImpl;
-exports.sendMessageUpdateArguments = sendMessageUpdateArguments;
+exports.$set('kRequestChannel', kRequestChannel);
+exports.$set('kMessageChannel', kMessageChannel);
+exports.$set('kNativeMessageChannel', kNativeMessageChannel);
+exports.$set('Port', Port);
+exports.$set('createPort', createPort);
+exports.$set('sendMessageImpl', sendMessageImpl);
+exports.$set('sendMessageUpdateArguments', sendMessageUpdateArguments);
 
 // For C++ code to call.
-exports.hasPort = hasPort;
-exports.dispatchOnConnect = dispatchOnConnect;
-exports.dispatchOnDisconnect = dispatchOnDisconnect;
-exports.dispatchOnMessage = dispatchOnMessage;
+exports.$set('hasPort', hasPort);
+exports.$set('dispatchOnConnect', dispatchOnConnect);
+exports.$set('dispatchOnDisconnect', dispatchOnDisconnect);
+exports.$set('dispatchOnMessage', dispatchOnMessage);
diff --git a/extensions/renderer/resources/messaging_utils.js b/extensions/renderer/resources/messaging_utils.js
index d1b563d..381fbeb 100644
--- a/extensions/renderer/resources/messaging_utils.js
+++ b/extensions/renderer/resources/messaging_utils.js
@@ -50,4 +50,4 @@ function alignSendMessageArguments(args, hasOptionsArgument) {
   return [targetId, request, responseCallback];
 }
 
-exports.alignSendMessageArguments = alignSendMessageArguments;
+exports.$set('alignSendMessageArguments', alignSendMessageArguments);
diff --git a/extensions/renderer/resources/mime_handler_private_custom_bindings.js b/extensions/renderer/resources/mime_handler_private_custom_bindings.js
index 83a41af..bd7eddd 100644
--- a/extensions/renderer/resources/mime_handler_private_custom_bindings.js
+++ b/extensions/renderer/resources/mime_handler_private_custom_bindings.js
@@ -72,4 +72,4 @@ binding.registerCustomHook(function(bindingsAPI) {
   });
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/mojo_private_custom_bindings.js b/extensions/renderer/resources/mojo_private_custom_bindings.js
index f898c07..18d6016 100644
--- a/extensions/renderer/resources/mojo_private_custom_bindings.js
+++ b/extensions/renderer/resources/mojo_private_custom_bindings.js
@@ -20,4 +20,4 @@ binding.registerCustomHook(function(bindingsAPI) {
   });
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/permissions_custom_bindings.js b/extensions/renderer/resources/permissions_custom_bindings.js
index 43b436e..492360a 100644
--- a/extensions/renderer/resources/permissions_custom_bindings.js
+++ b/extensions/renderer/resources/permissions_custom_bindings.js
@@ -89,4 +89,4 @@ binding.registerCustomHook(function(api) {
       permissions.onAdded.dispatchToListener;
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/printer_provider_custom_bindings.js b/extensions/renderer/resources/printer_provider_custom_bindings.js
index 061029b..4bf6f12 100644
--- a/extensions/renderer/resources/printer_provider_custom_bindings.js
+++ b/extensions/renderer/resources/printer_provider_custom_bindings.js
@@ -120,4 +120,4 @@ handleEvent('onGetUsbPrinterInfoRequested',
             function(args, callback) { callback(true); },
             printerProviderInternal.reportUsbPrinterInfo);
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/runtime_custom_bindings.js b/extensions/renderer/resources/runtime_custom_bindings.js
index 2b0e44a..1f829d4 100644
--- a/extensions/renderer/resources/runtime_custom_bindings.js
+++ b/extensions/renderer/resources/runtime_custom_bindings.js
@@ -202,5 +202,5 @@ binding.registerCustomHook(function(binding, id, contextType) {
   bindDirectoryEntryCallback('getPackageDirectoryEntry', apiFunctions);
 });
 
-exports.bindDirectoryEntryCallback = bindDirectoryEntryCallback;
-exports.binding = binding.generate();
+exports.$set('bindDirectoryEntryCallback', bindDirectoryEntryCallback);
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/schema_utils.js b/extensions/renderer/resources/schema_utils.js
index 3d7e929..f778275 100644
--- a/extensions/renderer/resources/schema_utils.js
+++ b/extensions/renderer/resources/schema_utils.js
@@ -153,7 +153,7 @@ function isFunctionSignatureAmbiguous(functionDef) {
   return false;
 };
 
-exports.isFunctionSignatureAmbiguous = isFunctionSignatureAmbiguous;
-exports.normalizeArgumentsAndValidate = normalizeArgumentsAndValidate;
-exports.schemaValidator = schemaValidator;
-exports.validate = validate;
+exports.$set('isFunctionSignatureAmbiguous', isFunctionSignatureAmbiguous);
+exports.$set('normalizeArgumentsAndValidate', normalizeArgumentsAndValidate);
+exports.$set('schemaValidator', schemaValidator);
+exports.$set('validate', validate);
diff --git a/extensions/renderer/resources/send_request.js b/extensions/renderer/resources/send_request.js
index 3dc523c..1692aaa 100644
--- a/extensions/renderer/resources/send_request.js
+++ b/extensions/renderer/resources/send_request.js
@@ -140,10 +140,10 @@ function clearCalledSendRequest() {
   calledSendRequest = false;
 }
 
-exports.sendRequest = sendRequest;
-exports.getCalledSendRequest = getCalledSendRequest;
-exports.clearCalledSendRequest = clearCalledSendRequest;
-exports.safeCallbackApply = safeCallbackApply;
+exports.$set('sendRequest', sendRequest);
+exports.$set('getCalledSendRequest', getCalledSendRequest);
+exports.$set('clearCalledSendRequest', clearCalledSendRequest);
+exports.$set('safeCallbackApply', safeCallbackApply);
 
 // Called by C++.
-exports.handleResponse = handleResponse;
+exports.$set('handleResponse', handleResponse);
diff --git a/extensions/renderer/resources/serial_custom_bindings.js b/extensions/renderer/resources/serial_custom_bindings.js
index 20d669a..d77631c 100644
--- a/extensions/renderer/resources/serial_custom_bindings.js
+++ b/extensions/renderer/resources/serial_custom_bindings.js
@@ -114,4 +114,4 @@ binding.registerCustomHook(function(bindingsAPI) {
   });
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/set_icon.js b/extensions/renderer/resources/set_icon.js
index 83f5a80..5b66d6b 100644
--- a/extensions/renderer/resources/set_icon.js
+++ b/extensions/renderer/resources/set_icon.js
@@ -133,4 +133,4 @@ function setIcon(details, callback) {
   throw new Error('Either the path or imageData property must be specified.');
 }
 
-exports.setIcon = setIcon;
+exports.$set('setIcon', setIcon);
diff --git a/extensions/renderer/resources/storage_area.js b/extensions/renderer/resources/storage_area.js
index de737ab..b5353ae 100644
--- a/extensions/renderer/resources/storage_area.js
+++ b/extensions/renderer/resources/storage_area.js
@@ -37,4 +37,4 @@ function StorageArea(namespace, schema) {
   $Array.forEach(apiFunctions, bindApiFunction);
 }
 
-exports.StorageArea = StorageArea;
+exports.$set('StorageArea', StorageArea);
diff --git a/extensions/renderer/resources/test_custom_bindings.js b/extensions/renderer/resources/test_custom_bindings.js
index 7310f06..6538efa 100644
--- a/extensions/renderer/resources/test_custom_bindings.js
+++ b/extensions/renderer/resources/test_custom_bindings.js
@@ -361,4 +361,4 @@ binding.registerCustomHook(function(api) {
   environmentSpecificBindings.registerHooks(api);
 });
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/uncaught_exception_handler.js b/extensions/renderer/resources/uncaught_exception_handler.js
index f87efbc..de4d71e 100644
--- a/extensions/renderer/resources/uncaught_exception_handler.js
+++ b/extensions/renderer/resources/uncaught_exception_handler.js
@@ -95,16 +95,16 @@ function safeErrorToString(e, omitType) {
  * @param {string=} priorStackTrace - Error message suffix.
  * @see formatErrorMessage
  */
-exports.handle = function(message, e, priorStackTrace) {
+exports.$set('handle', function(message, e, priorStackTrace) {
   message = formatErrorMessage(message, e, priorStackTrace);
   handler(message, e);
-};
+});
 
 // |newHandler| A function which matches |handler|.
-exports.setHandler = function(newHandler) {
+exports.$set('setHandler', function(newHandler) {
   handler = newHandler;
-};
+});
 
-exports.getStackTrace = getStackTrace;
-exports.getExtensionStackTrace = getExtensionStackTrace;
-exports.safeErrorToString = safeErrorToString;
+exports.$set('getStackTrace', getStackTrace);
+exports.$set('getExtensionStackTrace', getExtensionStackTrace);
+exports.$set('safeErrorToString', safeErrorToString);
diff --git a/extensions/renderer/resources/utils.js b/extensions/renderer/resources/utils.js
index ba14e8d..66094b90 100644
--- a/extensions/renderer/resources/utils.js
+++ b/extensions/renderer/resources/utils.js
@@ -166,9 +166,9 @@ function promise(func) {
   });
 }
 
-exports.forEach = forEach;
-exports.loadTypeSchema = loadTypeSchema;
-exports.lookup = lookup;
-exports.expose = expose;
-exports.deepCopy = deepCopy;
-exports.promise = promise;
+exports.$set('forEach', forEach);
+exports.$set('loadTypeSchema', loadTypeSchema);
+exports.$set('lookup', lookup);
+exports.$set('expose', expose);
+exports.$set('deepCopy', deepCopy);
+exports.$set('promise', promise);
diff --git a/extensions/renderer/resources/web_request_custom_bindings.js b/extensions/renderer/resources/web_request_custom_bindings.js
index 045fe96..2dd7ce4 100644
--- a/extensions/renderer/resources/web_request_custom_bindings.js
+++ b/extensions/renderer/resources/web_request_custom_bindings.js
@@ -20,4 +20,4 @@ binding.registerCustomHook(function(api) {
 
 binding.registerCustomEvent(WebRequestEvent);
 
-exports.binding = binding.generate();
+exports.$set('binding', binding.generate());
diff --git a/extensions/renderer/resources/web_request_internal_custom_bindings.js b/extensions/renderer/resources/web_request_internal_custom_bindings.js
index 76460ee..7c9e279 100644
--- a/extensions/renderer/resources/web_request_internal_custom_bindings.js
+++ b/extensions/renderer/resources/web_request_internal_custom_bindings.js
@@ -188,5 +188,5 @@ var WebRequestEvent = utils.expose('WebRequestEvent',
 ] });
 
 webRequestInternal = binding.generate();
-exports.binding = webRequestInternal;
-exports.WebRequestEvent = WebRequestEvent;
+exports.$set('binding', webRequestInternal);
+exports.$set('WebRequestEvent', WebRequestEvent);