Load extensions features file separately when needed

chrome/common/extensions/api/extension_api.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/common/extensions/api/extension_api.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 316 matching lines @@
 }
 
 ExtensionAPI::ExtensionAPI() {
 }
 
 ExtensionAPI::~ExtensionAPI() {
 }
 
 void ExtensionAPI::InitDefaultConfiguration() {
   RegisterDependencyProvider(
-      "api", BaseFeatureProvider::GetAPIFeatures());
+      "api", BaseFeatureProvider::LazyGetFeaturesByName("api"));
   RegisterDependencyProvider(
-      "manifest", BaseFeatureProvider::GetManifestFeatures());
+      "manifest", BaseFeatureProvider::LazyGetFeaturesByName("manifest"));
   RegisterDependencyProvider(
-      "permission", BaseFeatureProvider::GetPermissionFeatures());
+      "permission", BaseFeatureProvider::LazyGetFeaturesByName("permission"));
 
   // Schemas to be loaded from resources.
   CHECK(unloaded_schemas_.empty());
   RegisterSchema("app", ReadFromResource(
       IDR_EXTENSION_API_JSON_APP));
   RegisterSchema("browserAction", ReadFromResource(
       IDR_EXTENSION_API_JSON_BROWSERACTION));
   RegisterSchema("browsingData", ReadFromResource(
       IDR_EXTENSION_API_JSON_BROWSINGDATA));
   RegisterSchema("commands", ReadFromResource(
@@ skipping 290 matching lines @@
   return extension->required_permission_set()->HasAnyAccessToAPI(name) ||
       extension->optional_permission_set()->HasAnyAccessToAPI(name);
 }
 
 bool ExtensionAPI::IsPrivilegedAPI(const std::string& name) {
   return completely_unprivileged_apis_.count(name) ||
       partially_unprivileged_apis_.count(name);
 }
 
 }  // namespace extensions