Add crash keys to capture useful data for origin mismatch crashes.

blimp/engine/app/blimp_engine_crash_keys.cc

Index: blimp/engine/app/blimp_engine_crash_keys.cc
diff --git a/blimp/engine/app/blimp_engine_crash_keys.cc b/blimp/engine/app/blimp_engine_crash_keys.cc
index f94774d344d0f0cdc5f27a885d42177ceab37b08..3900800e444d7e52832bfb2471d10860a98f38aa 100644
--- a/blimp/engine/app/blimp_engine_crash_keys.cc
+++ b/blimp/engine/app/blimp_engine_crash_keys.cc
@@ -70,6 +70,13 @@ size_t RegisterEngineCrashKeys() {
       { "initrf_root_process_is_live", crash_keys::kSmallSize},
       { "initrf_root_proxy_is_live", crash_keys::kSmallSize},
 
+      // Temporary for https://crbug.com/630103.
+      { "origin_mismatch_url", crash_keys::kLargeSize },
+      { "origin_mismatch_origin", crash_keys::kMediumSize },
+      { "origin_mismatch_transition", crash_keys::kSmallSize },
+      { "origin_mismatch_redirects", crash_keys::kSmallSize },
+      { "origin_mismatch_same_page", crash_keys::kSmallSize },
+
       // Temporary for https://crbug.com/612711.
       { "aci_wrong_sp_extension_id", crash_keys::kSmallSize },