Work on getting things built with -Wimplicit-fallthrough. This CL was uploaded by git cl split.

Bug: 177475
R=kbr@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I3048cd151bc720d0edbacbec698723f07b65842a
Reviewed-on: https://chromium-review.googlesource.com/889760
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532130}

gpu/gles2_conform_support/egl/config.cc

@@ -56,6 +56,7 @@ bool Config::Matches(const EGLint* attrib_list) const {
               (requested_surface_type & surface_type_) !=
                   requested_surface_type)
             return false;
+          break;
         }
         default:
           break;