base: Add Is* functions to Value class.

chrome/browser/extensions/extension_settings_api.cc

 // Copyright (c) 2011 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 "base/bind.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_settings_api.h"
 #include "chrome/browser/profiles/profile.h"
 
@@ skipping 41 matching lines @@
 
 // Concrete settings functions
 
 bool GetSettingsFunction::RunWithStorageImpl(
     ExtensionSettingsStorage* storage) {
   Value *input;
   EXTENSION_FUNCTION_VALIDATE(args_->Get(0, &input));
 
   std::string as_string;
   ListValue* as_list;
-  if (input->IsType(Value::TYPE_NULL)) {
+  if (input->IsNull()) {
     storage->Get(new StorageResultCallback(this));
   } else if (input->GetAsString(&as_string)) {
     storage->Get(as_string, new StorageResultCallback(this));
   } else if (input->GetAsList(&as_list)) {
     storage->Get(*as_list, new StorageResultCallback(this));
   } else {
     error_ = kUnsupportedArgumentType;
     return false;
   }
 
@@ skipping 25 matching lines @@
   }
 
   return true;
 }
 
 bool ClearSettingsFunction::RunWithStorageImpl(
     ExtensionSettingsStorage* storage) {
   storage->Clear(new StorageResultCallback(this));
   return true;
 }