[generators] Desugar yield*.

src/messages.h

Index: src/messages.h
diff --git a/src/messages.h b/src/messages.h
index 8bc11cb63587c6f61676f7da4acd9f590f7c12e2..8e1f9e87f0a602d70934f56351213fe104b04d20 100644
--- a/src/messages.h
+++ b/src/messages.h
@@ -316,10 +316,13 @@ class CallSite {
     "to be non-writable is deprecated")                                        \
   T(StrongSetProto,                                                            \
     "On strong object %, redefining the internal prototype is deprecated")     \
+  T(SymbolIteratorInvalid,                                                     \
+    "Result of the Symbol.iterator method is not an object")                   \
   T(SymbolKeyFor, "% is not a symbol")                                         \
   T(SymbolToNumber, "Cannot convert a Symbol value to a number")               \
   T(SymbolToString, "Cannot convert a Symbol value to a string")               \
   T(SimdToNumber, "Cannot convert a SIMD value to a number")                   \
+  T(ThrowMethodMissing, "The iterator does not provide a 'throw' method.")     \
   T(UndefinedOrNullToObject, "Cannot convert undefined or null to object")     \
   T(ValueAndAccessor,                                                          \
     "Invalid property descriptor. Cannot both specify accessors and a value "  \