Change the platform app manifest structure.

chrome/common/extensions/manifest_tests/extension_manifests_background_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 "chrome/common/extensions/manifest_tests/extension_manifest_test.h"
 
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 50 matching lines @@
   scoped_ptr<DictionaryValue> manifest(
       LoadManifestFile("background_page_legacy.json", &error));
   ASSERT_TRUE(manifest.get());
   extension = LoadAndExpectSuccess(Manifest(manifest.get(), ""));
   ASSERT_TRUE(extension);
   EXPECT_EQ("/foo.html", extension->GetBackgroundURL().path());
 
   manifest->SetInteger(keys::kManifestVersion, 2);
   Feature* feature = SimpleFeatureProvider::GetManifestFeatures()->
       GetFeature("background_page");
-  extension = LoadAndExpectSuccess(Manifest(manifest.get(), ""));
-  ASSERT_TRUE(extension);
-  ASSERT_EQ(1u, extension->install_warnings().size());
-  EXPECT_EQ(feature->GetErrorMessage(Feature::INVALID_MAX_MANIFEST_VERSION),
-            extension->install_warnings()[0]);
+  LoadAndExpectWarning(
+      Manifest(manifest.get(), ""),
+      feature->GetErrorMessage(Feature::INVALID_MAX_MANIFEST_VERSION));
 }
 
 TEST_F(ExtensionManifestTest, BackgroundAllowNoJsAccess) {
   scoped_refptr<Extension> extension;
   extension = LoadAndExpectSuccess("background_allow_no_js_access.json");
   ASSERT_TRUE(extension);
   EXPECT_FALSE(extension->allow_background_js_access());
 
   extension = LoadAndExpectSuccess("background_allow_no_js_access2.json");
   ASSERT_TRUE(extension);
@@ skipping 16 matching lines @@
   EXPECT_TRUE(extension->has_lazy_background_page());
 
   ListValue* permissions = new ListValue();
   permissions->Append(Value::CreateStringValue("webRequest"));
   manifest->Set(keys::kPermissions, permissions);
   LoadAndExpectError(Manifest(manifest.get(), ""),
                      errors::kWebRequestConflictsWithLazyBackground);
 }
 
 }  // namespace extensions