Add the definition of the webRequest and webNavigation APIs.

chrome/browser/extensions/extension_webrequest_apitest.cc

Index: chrome/browser/extensions/extension_webrequest_apitest.cc
diff --git a/chrome/browser/extensions/extension_webrequest_apitest.cc b/chrome/browser/extensions/extension_webrequest_apitest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..833312f81fedf20dc347b50951d9856747a3920b
--- /dev/null
+++ b/chrome/browser/extensions/extension_webrequest_apitest.cc
@@ -0,0 +1,14 @@
+// Copyright (c) 2010 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/command_line.h"
+#include "chrome/browser/extensions/extension_apitest.h"
+#include "chrome/common/chrome_switches.h"
+
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, WebRequest) {
+  CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kEnableExperimentalExtensionApis);
+
+  ASSERT_TRUE(RunExtensionTest("webrequest/api")) << message_;
+}