Revert "Refactor ExtensionManifestTest to allow usage in src/extensions"

chrome/common/extensions/manifest_tests/extension_manifests_about_unittest.cc

 // Copyright 2014 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/manifest_tests/chrome_manifest_test.h"
+#include "chrome/common/extensions/manifest_tests/extension_manifest_test.h"
 #include "chrome/common/extensions/manifest_url_handler.h"
 #include "extensions/common/manifest_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace errors = extensions::manifest_errors;
 
-class AboutPageManifestTest : public ChromeManifestTest {};
+class AboutPageManifestTest : public ExtensionManifestTest {};
 
 TEST_F(AboutPageManifestTest, AboutPageInSharedModules) {
   scoped_refptr<extensions::Extension> extension;
   extension = LoadAndExpectSuccess("shared_module_about.json");
   EXPECT_EQ(GURL("chrome-extension://" + extension->id() + "/about.html"),
             extensions::ManifestURL::GetAboutPage(extension.get()));
 
   Testcase testcases[] = {
       // Forbid data types other than strings.
       Testcase("shared_module_about_invalid_type.json",
                errors::kInvalidAboutPage),
 
       // Forbid absolute URLs.
       Testcase("shared_module_about_absolute.json",
                errors::kInvalidAboutPageExpectRelativePath)};
   RunTestcases(testcases, arraysize(testcases), EXPECT_TYPE_ERROR);
 }