Convert //extensions/{common,shell} from scoped_ptr to std::unique_ptr

extensions/shell/browser/shell_prefs.cc

Index: extensions/shell/browser/shell_prefs.cc
diff --git a/extensions/shell/browser/shell_prefs.cc b/extensions/shell/browser/shell_prefs.cc
index 82185cfcbd6633aed65a8b24facba87211a7309d..eea12aee1ef380df70b064d484ff09944e199b36 100644
--- a/extensions/shell/browser/shell_prefs.cc
+++ b/extensions/shell/browser/shell_prefs.cc
@@ -39,7 +39,7 @@ scoped_refptr<JsonPrefStore> CreateAndLoadPrefStore(const FilePath& filepath) {
       JsonPrefStore::GetTaskRunnerForFile(
           filepath, content::BrowserThread::GetBlockingPool());
   scoped_refptr<JsonPrefStore> pref_store =
-      new JsonPrefStore(filepath, task_runner, scoped_ptr<PrefFilter>());
+      new JsonPrefStore(filepath, task_runner, std::unique_ptr<PrefFilter>());
   pref_store->ReadPrefs();  // Synchronous.
   return pref_store;
 }
@@ -48,7 +48,7 @@ scoped_refptr<JsonPrefStore> CreateAndLoadPrefStore(const FilePath& filepath) {
 
 namespace shell_prefs {
 
-scoped_ptr<PrefService> CreateLocalState(const FilePath& data_dir) {
+std::unique_ptr<PrefService> CreateLocalState(const FilePath& data_dir) {
   FilePath filepath = data_dir.AppendASCII("local_state.json");
   scoped_refptr<JsonPrefStore> pref_store = CreateAndLoadPrefStore(filepath);
 
@@ -63,7 +63,7 @@ scoped_ptr<PrefService> CreateLocalState(const FilePath& data_dir) {
   return factory.Create(registry);
 }
 
-scoped_ptr<PrefService> CreateUserPrefService(
+std::unique_ptr<PrefService> CreateUserPrefService(
     content::BrowserContext* browser_context) {
   FilePath filepath = browser_context->GetPath().AppendASCII("user_prefs.json");
   scoped_refptr<JsonPrefStore> pref_store = CreateAndLoadPrefStore(filepath);
@@ -81,7 +81,7 @@ scoped_ptr<PrefService> CreateUserPrefService(
   PrefRegistrySyncable* pref_registry = new PrefRegistrySyncable;
   ExtensionPrefs::RegisterProfilePrefs(pref_registry);
 
-  scoped_ptr<PrefService> pref_service = factory.Create(pref_registry);
+  std::unique_ptr<PrefService> pref_service = factory.Create(pref_registry);
   user_prefs::UserPrefs::Set(browser_context, pref_service.get());
   return pref_service;
 }