base: Add Is* functions to Value class.

chrome/browser/extensions/execute_code_in_tab_function.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 "chrome/browser/extensions/execute_code_in_tab_function.h"
 
 #include "base/callback.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 42 matching lines @@
   }
 
   execute_tab_id_ = -1;
   Browser* browser = NULL;
   TabContentsWrapper* contents = NULL;
 
   // If |tab_id| is specified, look for it. Otherwise default to selected tab
   // in the current window.
   Value* tab_value = NULL;
   EXTENSION_FUNCTION_VALIDATE(args_->Get(0, &tab_value));
-  if (tab_value->IsType(Value::TYPE_NULL)) {
+  if (tab_value->IsNull()) {
     browser = GetCurrentBrowser();
     if (!browser) {
       error_ = keys::kNoCurrentWindowError;
       return false;
     }
     if (!ExtensionTabUtil::GetDefaultTab(browser, &contents, &execute_tab_id_))
       return false;
   } else {
     EXTENSION_FUNCTION_VALIDATE(tab_value->GetAsInteger(&execute_tab_id_));
     if (!ExtensionTabUtil::GetTabById(execute_tab_id_, profile(),
@@ skipping 136 matching lines @@
   if (!error.empty()) {
     CHECK(!success);
     error_ = error;
   }
 
   SendResponse(success);
 
   Observe(NULL);
   Release();  // balanced in Execute()
 }