[vr] Fix missing switch case in the vr test app

Should have had a break; it got missed.

Bug: 177475
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_vr;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I517d26a99ad55823b946a76865fa86c4a93ab3ca
Reviewed-on: https://chromium-review.googlesource.com/899585
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Commit-Queue: Ian Vollick <vollick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534162}
diff --git a/chrome/browser/vr/testapp/vr_test_context.cc b/chrome/browser/vr/testapp/vr_test_context.cc
index a5a1eed..73ff645e 100644
--- a/chrome/browser/vr/testapp/vr_test_context.cc
+++ b/chrome/browser/vr/testapp/vr_test_context.cc
@@ -182,6 +182,7 @@
         break;
       case ui::DomCode::US_B:
         ui_->Dump(true);
+        break;
       case ui::DomCode::US_V:
         CreateFakeVoiceSearchResult();
         break;