Fix typo in ExpressionClassifier cleanup

"ExpressionProductions" was missing the plural. I don't think this
changed any behavior, but I'd rather be safe than sorry. Also
removed redundant mention of TailCall production.

A future patch will attempt to make calls to Accumulate make more sense,
in general.

R=littledan@chromium.org

Review-Url: https://codereview.chromium.org/2270153002
Cr-Commit-Position: refs/heads/master@{#38842}

src/parsing/parser-base.h

@@ -2429,8 +2429,7 @@ ParserBase<Impl>::ParseAssignmentExpression(bool accept_IN,
   if (!is_destructuring_assignment) {
     // This may be an expression or a pattern, so we must continue to
     // accumulate expression-related errors.
-    productions |= ExpressionClassifier::ExpressionProduction |
-                   ExpressionClassifier::TailCallExpressionProduction |
+    productions |= ExpressionClassifier::ExpressionProductions |
                    ExpressionClassifier::ObjectLiteralProduction;
   }