[Mac] Modify the ObjC exception preprocessor to make some exceptions fatal.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 982e77dd6c7acaf14a68cc89384425c2d0ef3440..e914e87e828c3e1df00d750aa540e1e2c7a243d3 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -3110,7 +3110,6 @@ test("unit_tests") {
     "../browser/budget_service/budget_database_unittest.cc",
     "../browser/budget_service/budget_manager_unittest.cc",
     "../browser/character_encoding_unittest.cc",
-    "../browser/chrome_browser_application_mac_unittest.mm",
     "../browser/chrome_content_browser_client_unittest.cc",
     "../browser/chrome_process_singleton_win_unittest.cc",
     "../browser/command_updater_unittest.cc",
@@ -3186,6 +3185,7 @@ test("unit_tests") {
     "../browser/loader/chrome_navigation_data_unittest.cc",
     "../browser/loader/chrome_resource_dispatcher_host_delegate_unittest.cc",
     "../browser/logging_chrome_unittest.cc",
+    "../browser/mac/exception_processor_unittest.mm",
     "../browser/mac/keystone_glue_unittest.mm",
     "../browser/manifest/manifest_icon_downloader_unittest.cc",
     "../browser/manifest/manifest_icon_selector_unittest.cc",