Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/extension_user_script_loader_unittest.cc

Index: chrome/browser/extensions/extension_user_script_loader_unittest.cc
diff --git a/chrome/browser/extensions/extension_user_script_loader_unittest.cc b/chrome/browser/extensions/extension_user_script_loader_unittest.cc
index e211b4894621c2171d616bd090d13704bdabeb6b..2e5db25ca8e6e93e0260b0990c64cc10d83c2e51 100644
--- a/chrome/browser/extensions/extension_user_script_loader_unittest.cc
+++ b/chrome/browser/extensions/extension_user_script_loader_unittest.cc
@@ -84,8 +84,8 @@ class ExtensionUserScriptLoaderTest : public testing::Test,
   // MessageLoop used in tests.
   base::MessageLoopForUI message_loop_;
 
-  scoped_ptr<content::TestBrowserThread> file_thread_;
-  scoped_ptr<content::TestBrowserThread> ui_thread_;
+  std::unique_ptr<content::TestBrowserThread> file_thread_;
+  std::unique_ptr<content::TestBrowserThread> ui_thread_;
 
   // Updated to the script shared memory when we get notified.
   base::SharedMemory* shared_memory_;