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

chrome/browser/extensions/component_migration_helper_unittest.cc

Index: chrome/browser/extensions/component_migration_helper_unittest.cc
diff --git a/chrome/browser/extensions/component_migration_helper_unittest.cc b/chrome/browser/extensions/component_migration_helper_unittest.cc
index a16ae618ebc24c6c3b91a4d593b91eff8e1ccd7f..8168c7748b19fcf49eabf07957459a3ce742e6cf 100644
--- a/chrome/browser/extensions/component_migration_helper_unittest.cc
+++ b/chrome/browser/extensions/component_migration_helper_unittest.cc
@@ -96,8 +96,8 @@ class ComponentMigrationHelperTest : public ExtensionServiceTestBase {
   }
 
   StrictMock<MockComponentActionDelegate> mock_delegate_;
-  scoped_ptr<StrictMock<MockComponentMigrationHelper>> mock_helper_;
-  scoped_ptr<FeatureSwitch::ScopedOverride> extension_action_redesign_;
+  std::unique_ptr<StrictMock<MockComponentMigrationHelper>> mock_helper_;
+  std::unique_ptr<FeatureSwitch::ScopedOverride> extension_action_redesign_;
 
   // Migrated extensions with browser actions.
   scoped_refptr<const Extension> migrated_extension_a_;