Lazily load extension API schemas

chrome/renderer/resources/extensions/test_custom_bindings.js

Index: chrome/renderer/resources/extensions/test_custom_bindings.js
diff --git a/chrome/renderer/resources/extensions/test_custom_bindings.js b/chrome/renderer/resources/extensions/test_custom_bindings.js
index 300ba42766ea71e38b8c8ff065196f4734a09226..62aee80090470cc3168e21174970d2b8a8960abd 100644
--- a/chrome/renderer/resources/extensions/test_custom_bindings.js
+++ b/chrome/renderer/resources/extensions/test_custom_bindings.js
@@ -8,8 +8,9 @@
 var binding = require('binding').Binding.create('test');
 
 var chrome = requireNative('chrome').GetChrome();
-var GetExtensionAPIDefinition =
-    requireNative('apiDefinitions').GetExtensionAPIDefinition;
+var GetExtensionAPIDefinitions =
+    requireNative('apiDefinitions').GetExtensionAPIDefinitions;
+var GetAvailability = requireNative('v8_context').GetAvailability;
 
 binding.registerCustomHook(function(api) {
   var chromeTest = api.compiledApi;
@@ -284,7 +285,9 @@ binding.registerCustomHook(function(api) {
   });
 
   apiFunctions.setHandleRequest('getApiDefinitions', function(apiNames) {
-    return GetExtensionAPIDefinition();
+    return GetExtensionAPIDefinitions(apiNames).filter(function(api) {
+      return GetAvailability(api.namespace).is_available;
+    });
   });
 });