Remove RenderFrameHost pointer from ChooserController.

chrome/browser/ui/views/device_chooser_content_view_unittest.cc

Index: chrome/browser/ui/views/device_chooser_content_view_unittest.cc
diff --git a/chrome/browser/ui/views/device_chooser_content_view_unittest.cc b/chrome/browser/ui/views/device_chooser_content_view_unittest.cc
index 047d238a6bf2565d93e14d551ff2a7806be65848..7d6cce1f5ee608b999a9dcdef38b406cb7211cf6 100644
--- a/chrome/browser/ui/views/device_chooser_content_view_unittest.cc
+++ b/chrome/browser/ui/views/device_chooser_content_view_unittest.cc
@@ -45,8 +45,7 @@ class DeviceChooserContentViewTest : public views::ViewsTestBase {
   // views::ViewsTestBase:
   void SetUp() override {
     views::ViewsTestBase::SetUp();
-    std::unique_ptr<MockChooserController> mock_chooser_controller(
-        new MockChooserController(nullptr));
+    auto mock_chooser_controller = base::MakeUnique<MockChooserController>();
     mock_chooser_controller_ = mock_chooser_controller.get();
     mock_table_view_observer_ = base::MakeUnique<MockTableViewObserver>();
     device_chooser_content_view_ = base::MakeUnique<DeviceChooserContentView>(