Lazily load extension API schemas

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 <algorithm>
 
+#include "chrome/common/extensions/api/extension_api.h"
+
 namespace {
 const char kInvalidExtensionNamespace[] = "Invalid extension namespace";
 }
 
 namespace extensions {
 
 ApiDefinitionsNatives::ApiDefinitionsNatives(Dispatcher* dispatcher,
                                              ChromeV8Context* context)
     : ChromeV8Extension(dispatcher, context->v8_context()),
       context_(context) {
-  RouteFunction("GetExtensionAPIDefinition",
-                base::Bind(&ApiDefinitionsNatives::GetExtensionAPIDefinition,
+  RouteFunction("GetExtensionAPIDefinitions",
+                base::Bind(&ApiDefinitionsNatives::GetExtensionAPIDefinitions,
                            base::Unretained(this)));
 }
 
-v8::Handle<v8::Value> ApiDefinitionsNatives::GetExtensionAPIDefinition(
+v8::Handle<v8::Value> ApiDefinitionsNatives::GetExtensionAPIDefinitions(
     const v8::Arguments& args) {
-  std::set<std::string> available_apis(context_->GetAvailableExtensionAPIs());
-  if (args.Length() == 0)
+  std::set<std::string> available_apis(
+      ExtensionAPI::GetSharedInstance()->GetAllAPINames());
+  if (args.Length() == 0 || args[0]->IsNull())
     return dispatcher()->v8_schema_registry()->GetSchemas(available_apis);

[not at google - send to devlin, 2013/03/22 22:10:12]

Oh I think it can be even simpler (sorry) looks like this is only ever called
with no args so it can be *only* line 31.

[cduvall, 2013/03/22 22:52:29]

Done.

 
   // Build set of APIs requested by the user.
   std::set<std::string> requested_apis;
   for (int i = 0; i < args.Length(); ++i) {
     if (!args[i]->IsString()) {
       v8::ThrowException(v8::String::New(kInvalidExtensionNamespace));
       return v8::Undefined();
     }
     requested_apis.insert(*v8::String::Utf8Value(args[i]->ToString()));
   }
 
-  // Filter those that are unknown.
-  std::set<std::string> apis_to_check;
-  std::set_intersection(requested_apis.begin(), requested_apis.end(),
-                        available_apis.begin(), available_apis.end(),
-                        std::inserter(apis_to_check, apis_to_check.begin()));
-  return dispatcher()->v8_schema_registry()->GetSchemas(apis_to_check);
+  return dispatcher()->v8_schema_registry()->GetSchemas(requested_apis);
 }
 
 }  // namespace extensions