Allow numeric literals to be checked for a decimal point.

src/ast-value-factory.h

Index: src/ast-value-factory.h
diff --git a/src/ast-value-factory.h b/src/ast-value-factory.h
index dd575e26abe337585351d96cbfddced2961cb23b..1b435f33eb57b12c446876c23b51582467d5ccc5 100644
--- a/src/ast-value-factory.h
+++ b/src/ast-value-factory.h
@@ -142,9 +142,11 @@ class AstValue : public ZoneObject {
   }
 
   bool IsNumber() const {
-    return type_ == NUMBER || type_ == SMI;
+    return type_ == NUMBER || type_ == NUMBER_WITH_DOT || type_ == SMI;
   }
 
+  bool ContainsDot() const { return type_ == NUMBER_WITH_DOT; }
+
   const AstRawString* AsString() const {
     if (type_ == STRING)
       return string_;
@@ -153,8 +155,7 @@ class AstValue : public ZoneObject {
   }
 
   double AsNumber() const {
-    if (type_ == NUMBER)
-      return number_;
+    if (type_ == NUMBER || type_ == NUMBER_WITH_DOT) return number_;
     if (type_ == SMI)
       return smi_;
     UNREACHABLE();
@@ -189,6 +190,7 @@ class AstValue : public ZoneObject {
     STRING,
     SYMBOL,
     NUMBER,
+    NUMBER_WITH_DOT,
     SMI,
     BOOLEAN,
     NULL_TYPE,
@@ -213,6 +215,11 @@ class AstValue : public ZoneObject {
     DCHECK(t == NULL_TYPE || t == UNDEFINED || t == THE_HOLE);
   }
 
+  void MarkWithDot() {
+    DCHECK(type_ == NUMBER);
+    type_ = NUMBER_WITH_DOT;
+  }
+
   Type type_;
 
   // Uninternalized value.
@@ -334,7 +341,7 @@ class AstValueFactory {
   const AstValue* NewString(const AstRawString* string);
   // A JavaScript symbol (ECMA-262 edition 6).
   const AstValue* NewSymbol(const char* name);
-  const AstValue* NewNumber(double number);
+  const AstValue* NewNumber(double number, bool with_dot = false);
   const AstValue* NewSmi(int number);
   const AstValue* NewBoolean(bool b);
   const AstValue* NewStringList(ZoneList<const AstRawString*>* strings);