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

extensions/browser/sandboxed_unpacker_unittest.cc

Index: extensions/browser/sandboxed_unpacker_unittest.cc
diff --git a/extensions/browser/sandboxed_unpacker_unittest.cc b/extensions/browser/sandboxed_unpacker_unittest.cc
index a66b2fa5423cebaca15281d8d80a556ac64507da..8ed3ce920dd82ee8c958967183423760de18dc86 100644
--- a/extensions/browser/sandboxed_unpacker_unittest.cc
+++ b/extensions/browser/sandboxed_unpacker_unittest.cc
@@ -131,8 +131,8 @@ class SandboxedUnpackerTest : public ExtensionsTest {
   base::ScopedTempDir extensions_dir_;
   MockSandboxedUnpackerClient* client_;
   scoped_refptr<SandboxedUnpacker> sandboxed_unpacker_;
-  scoped_ptr<content::TestBrowserThreadBundle> browser_threads_;
-  scoped_ptr<content::InProcessUtilityThreadHelper>
+  std::unique_ptr<content::TestBrowserThreadBundle> browser_threads_;
+  std::unique_ptr<content::InProcessUtilityThreadHelper>
       in_process_utility_thread_helper_;
 };