Remove service worker concepts from apps/extensions manifest parsing.

extensions/common/manifest.cc

 // Copyright 2013 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 "extensions/common/manifest.h"
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/strings/string_split.h"
@@ skipping 102 matching lines @@
       value_(value.Pass()),
       type_(TYPE_UNKNOWN) {
   if (value_->HasKey(keys::kTheme)) {
     type_ = TYPE_THEME;
   } else if (value_->HasKey(keys::kExport)) {
     type_ = TYPE_SHARED_MODULE;
   } else if (value_->HasKey(keys::kApp)) {
     if (value_->Get(keys::kWebURLs, NULL) ||
         value_->Get(keys::kLaunchWebURL, NULL)) {
       type_ = TYPE_HOSTED_APP;
-    } else if (value_->Get(keys::kPlatformAppBackground, NULL) ||
-               value_->Get(keys::kPlatformAppServiceWorker, NULL)) {
+    } else if (value_->Get(keys::kPlatformAppBackground, NULL)) {
       type_ = TYPE_PLATFORM_APP;
     } else {
       type_ = TYPE_LEGACY_PACKAGED_APP;
     }
   } else {
     type_ = TYPE_EXTENSION;
   }
   CHECK_NE(type_, TYPE_UNKNOWN);
 }
 
@@ skipping 122 matching lines @@
   Feature* feature = FeatureProvider::GetManifestFeatures()->GetFeature(key);
   if (!feature)
     return true;
 
   return feature->IsAvailableToManifest(
                       extension_id_, type_, location_, GetManifestVersion())
       .is_available();
 }
 
 }  // namespace extensions