[es6] Perform the IsConstructor test in GetSuperConstructor.

test/cctest/interpreter/bytecode_expectations/ClassAndSuperClass.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 wrap: no
 test function name: test
 
 ---
 snippet: "
@@ skipping 89 matching lines @@
       constructor(x) { this.x_ = x; }
     }
     class B extends A {
       constructor() { super(1); this.y_ = 2; }
     }
     test = new B().constructor;
   })();
 "
 frame size: 4
 parameter count: 1
-bytecode array length: 82
+bytecode array length: 79
 bytecodes: [
                 B(Mov), R(closure), R(1),
                 B(Mov), R(new_target), R(0),
                 B(Ldar), R(new_target),
   /*  113 E> */ B(StackCheck),
-  /*  118 S> */ B(CallRuntime), U16(Runtime::k_GetSuperConstructor), R(1), U8(1),
-                B(Star), R(2),
+  /*  118 S> */ B(Ldar), R(1),
+                B(GetSuperConstructor), R(2),
                 B(LdaSmi), U8(1),
                 B(Star), R(3),
                 B(Ldar), R(0),
   /*  118 E> */ B(New), R(2), R(3), U8(1), U8(2),
                 B(Star), R(2),
                 B(Ldar), R(this),
                 B(JumpIfNotHole), U8(4),
                 B(Jump), U8(11),
                 B(LdaConstant), U8(0),
                 B(Star), R(3),
@@ skipping 29 matching lines @@
       constructor() { this.x_ = 1; }
     }
     class B extends A {
       constructor() { super(); this.y_ = 2; }
     }
     test = new B().constructor;
   })();
 "
 frame size: 4
 parameter count: 1
-bytecode array length: 78
+bytecode array length: 75
 bytecodes: [
                 B(Mov), R(closure), R(1),
                 B(Mov), R(new_target), R(0),
                 B(Ldar), R(new_target),
   /*  112 E> */ B(StackCheck),
-  /*  117 S> */ B(CallRuntime), U16(Runtime::k_GetSuperConstructor), R(1), U8(1),
-                B(Star), R(2),
+  /*  117 S> */ B(Ldar), R(1),
+                B(GetSuperConstructor), R(2),
                 B(Ldar), R(0),
   /*  117 E> */ B(New), R(2), R(0), U8(0), U8(2),
                 B(Star), R(2),
                 B(Ldar), R(this),
                 B(JumpIfNotHole), U8(4),
                 B(Jump), U8(11),
                 B(LdaConstant), U8(0),
                 B(Star), R(3),
   /*  117 E> */ B(CallRuntime), U16(Runtime::kThrowReferenceError), R(3), U8(1),
                 B(Mov), R(2), R(this),
@@ skipping 12 matching lines @@
                 B(CallRuntime), U16(Runtime::kThrowReferenceError), R(2), U8(1),
   /*  139 S> */ B(Return),
 ]
 constant pool: [
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["this"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["y_"],
 ]
 handlers: [
 ]