Convert tabs, windows, and extension APIs to feature system.

chrome/renderer/extensions/api_definitions_natives.cc

 // 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.
 
 #include "chrome/renderer/extensions/api_definitions_natives.h"
 
+#include "chrome/common/extensions/api/extension_api.h"
+
 namespace extensions {
 
 ApiDefinitionsNatives::ApiDefinitionsNatives(
     ExtensionDispatcher* extension_dispatcher)
     : ChromeV8Extension(extension_dispatcher) {
   RouteFunction("GetExtensionAPIDefinition",
                 base::Bind(&ApiDefinitionsNatives::GetExtensionAPIDefinition,
                            base::Unretained(this)));
+  RouteFunction("IsMemberAllowed",
+                base::Bind(&ApiDefinitionsNatives::IsMemberAllowed,
+                           base::Unretained(this)));
 }
 
 v8::Handle<v8::Value> ApiDefinitionsNatives::GetExtensionAPIDefinition(
     const v8::Arguments& args) {
   ChromeV8Context* v8_context =
       extension_dispatcher()->v8_context_set().GetCurrent();
   CHECK(v8_context);
   return extension_dispatcher()->v8_schema_registry()->GetSchemas(
       v8_context->GetAvailableExtensionAPIs());
 }
 
+v8::Handle<v8::Value> ApiDefinitionsNatives::IsMemberAllowed(
+    const v8::Arguments& arguments) {
+  if (arguments.Length() < 1 || !arguments[0]->IsString()) {
+    LOG(ERROR) << "Invalid arguments";
+    return v8::Boolean::New(false);
+  }
+
+  ChromeV8Context* v8_context =
+      extension_dispatcher()->v8_context_set().GetCurrent();
+  CHECK(v8_context);
+
+  const Extension* extension =
+      extension_dispatcher()->extensions()->GetByID(
+          v8_context->GetExtensionID());
+
+  std::string api_name = *v8::String::AsciiValue(arguments[0]->ToString());
+  bool result = ExtensionAPI::GetSharedInstance()->IsAvailable(
+      api_name,
+      extension,
+      v8_context->context_type());
+  return v8::Boolean::New(result);
+}
+
 }  // namespace extensions