Use a const reference in IntentPickerResponse

chrome/browser/ui/views/intent_picker_bubble_view_unittest.cc

Index: chrome/browser/ui/views/intent_picker_bubble_view_unittest.cc
diff --git a/chrome/browser/ui/views/intent_picker_bubble_view_unittest.cc b/chrome/browser/ui/views/intent_picker_bubble_view_unittest.cc
index 14f7227eb8d9f0e991045118be5afaf27e1f2945..44a7a0abf8554aa4175304ac6baec1dd8d24be53 100644
--- a/chrome/browser/ui/views/intent_picker_bubble_view_unittest.cc
+++ b/chrome/browser/ui/views/intent_picker_bubble_view_unittest.cc
@@ -67,7 +67,7 @@ class IntentPickerBubbleViewTest : public BrowserWithTestWindowTest {
   }
 
   // Dummy method to be called upon bubble closing.
-  void OnBubbleClosed(std::string selected_app_package,
+  void OnBubbleClosed(const std::string& selected_app_package,
                       arc::ArcNavigationThrottle::CloseReason close_reason) {}
 
   std::unique_ptr<IntentPickerBubbleView> bubble_;