Add Regex isCaseSensitive and isMultiLine to the service protocol and Observatory.

runtime/vm/service/service.md

Index: runtime/vm/service/service.md
diff --git a/runtime/vm/service/service.md b/runtime/vm/service/service.md
index f05214dc5ab60f61e06a3c3efbb1ce972f57dbfb..7c0b6fef4f1a37ae2bcf5ac6a05796e9fb30fd9d 100644
--- a/runtime/vm/service/service.md
+++ b/runtime/vm/service/service.md
@@ -1420,6 +1420,18 @@ class Instance extends Object {
   //   RegExp
   String pattern [optional];
 
+  // Whether this regular expression is case sensitive.
+  //
+  // Provided for instance kinds:
+  //   RegExp
+  bool isCaseSensitive [optional];
+
+  // Whether this regular expression matches multiple lines.
+  //
+  // Provided for instance kinds:
+  //   RegExp
+  bool isMultiLine [optional];
+
   // The key for a WeakProperty instance.
   //
   // Provided for instance kinds: