Update dart2js parser to disallow repeated comparisons and prefix +.

tests/co19/co19-dart2js.status

Index: tests/co19/co19-dart2js.status
diff --git a/tests/co19/co19-dart2js.status b/tests/co19/co19-dart2js.status
index ac2bfd8a0da344dd27af9b7a9f2d13a46ed88bac..b8db1bf4ea49bc6f687897d16170f486370150b7 100644
--- a/tests/co19/co19-dart2js.status
+++ b/tests/co19/co19-dart2js.status
@@ -331,12 +331,6 @@ Language/12_Expressions/01_Constants_A20_t03: Fail # Checks that an identifier e
 Language/12_Expressions/05_Strings/1_String_Interpolation_A01_t09: Fail # Checks that it is a compile-time error if a string interpolation construct does not start with IDENTIFIER_NO_DOLLAR or opening brace.
 Language/12_Expressions/05_Strings_A02_t46: Fail # Checks that multi-line strings that contain characters and sequences prohibited by this grammar, cause compile-time errors.
 Language/12_Expressions/05_Strings_A02_t48: Fail # Checks that multi-line strings that contain characters and sequences prohibited by this grammar, cause compile-time errors.
-Language/12_Expressions/22_Equality_A01_t15: Fail # Checks that equality expressions cannot be operands of another equality expression.
-Language/12_Expressions/22_Equality_A01_t16: Fail # Checks that equality expressions cannot be operands of another equality expression.
-Language/12_Expressions/23_Relational_Expressions_A01_t10: Fail # Checks that a relational expression cannot be the operand of another relational expression.
-Language/12_Expressions/23_Relational_Expressions_A01_t11: Fail # Checks that a relational expression cannot be the operand of another relational expression.
-Language/12_Expressions/23_Relational_Expressions_A01_t12: Fail # Checks that a relational expression cannot be the operand of another relational expression.
-Language/12_Expressions/23_Relational_Expressions_A01_t13: Fail # Checks that a relational expression cannot be the operand of another relational expression.
 Language/12_Expressions/30_Identifier_Reference_A04_t09: Fail # Checks that it is a compile-time error when a built-in identifier dynamic is used as the declared name of a type variable.
 Language/12_Expressions/30_Identifier_Reference_A05_t01: Fail # Checks that it is a compile-time error when a built-in identifier "abstract" is used as a type annotation of a local variable.
 Language/12_Expressions/30_Identifier_Reference_A05_t12: Fail # Checks that it is a compile-time error when a built-in identifier "static" is used as a type annotation of a local variable.