Move Extension into extensions namespace

chrome/common/extensions/manifest_tests/extension_manifests_validapp_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/values.h"
 #include "base/memory/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST_F(ExtensionManifestTest, ValidApp) {
-  scoped_refptr<Extension> extension(LoadAndExpectSuccess("valid_app.json"));
+  scoped_refptr<extensions::Extension> extension(
+      LoadAndExpectSuccess("valid_app.json"));
   URLPatternSet expected_patterns;
   AddPattern(&expected_patterns, "http://www.google.com/mail/*");
   AddPattern(&expected_patterns, "http://www.google.com/foobar/*");
   EXPECT_EQ(expected_patterns, extension->web_extent());
   EXPECT_EQ(extension_misc::LAUNCH_TAB, extension->launch_container());
   EXPECT_EQ("http://www.google.com/mail/", extension->launch_web_url());
 }
 
 TEST_F(ExtensionManifestTest, AllowUnrecognizedPermissions) {
   std::string error;
   scoped_ptr<DictionaryValue> manifest(
       LoadManifestFile("valid_app.json", &error));
   ListValue* permissions = NULL;
   ASSERT_TRUE(manifest->GetList("permissions", &permissions));
   permissions->Append(new StringValue("not-a-valid-permission"));
   LoadAndExpectSuccess(Manifest(manifest.get(), ""));
 }