Consolidate manifest handler registration.

chrome/common/extensions/manifest_tests/extension_manifests_platformapp_unittest.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 "base/command_line.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/memory/linked_ptr.h"
 #include "chrome/common/chrome_switches.h"
-#include "chrome/common/extensions/background_info.h"
 #include "chrome/common/extensions/csp_handler.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/common/extensions/incognito_handler.h"
 #include "chrome/common/extensions/manifest_handlers/app_isolation_info.h"
 #include "chrome/common/extensions/manifest_tests/extension_manifest_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace errors = extension_manifest_errors;
 
 namespace extensions {
 
 class PlatformAppsManifestTest : public ExtensionManifestTest {
- protected:
-  virtual void SetUp() OVERRIDE {
-    testing::Test::SetUp();
-    (new BackgroundManifestHandler)->Register();
-    (new CSPHandler(true))->Register();  // platform app.
-    (new IncognitoHandler)->Register();
-    (new AppIsolationHandler)->Register();
-  }
 };
 
 TEST_F(PlatformAppsManifestTest, PlatformApps) {
   scoped_refptr<Extension> extension =
       LoadAndExpectSuccess("init_valid_platform_app.json");
   EXPECT_TRUE(AppIsolationInfo::HasIsolatedStorage(extension));
   EXPECT_TRUE(IncognitoInfo::IsSplitMode(extension));
 
   extension =
       LoadAndExpectSuccess("init_valid_platform_app_no_manifest_version.json");
@@ skipping 104 matching lines @@
 
   // Now try again with the experimental flag set.
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
   for (size_t i = 0; i < arraysize(kPlatformAppExperimentalApis); ++i) {
     LoadAndExpectSuccess(Manifest(manifests[i].get(), ""));
   }
 }
 
 }  // namespace extensions