Removes crash keys for crbug.com/621730

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 527aa79ae5b7d336eb6b46d7513b4e37c20a21ce..dade52bc5ef33fd3dfeaccd96de3e7cc1068d986 100644
--- a/blimp/engine/app/blimp_engine_crash_keys.cc
+++ b/blimp/engine/app/blimp_engine_crash_keys.cc
@@ -73,12 +73,6 @@ size_t RegisterEngineCrashKeys() {
       // Temporary for https://crbug.com/612711.
       { "aci_wrong_sp_extension_id", crash_keys::kSmallSize },
 
-      // Temporary for http://crbug.com/621730.
-      { "postmessage_src_origin", crash_keys::kMediumSize },
-      { "postmessage_dst_origin", crash_keys::kMediumSize },
-      { "postmessage_dst_url", crash_keys::kLargeSize },
-      { "postmessage_script_info", crash_keys::kLargeSize },
-
       // Temporary for https://crbug.com/616149.
       { "existing_extension_pref_value_type", crash_keys::kSmallSize },