[runtime] Introduce dedicated JSBoundFunction to represent bound functions.

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index 5732d0b24914286399bc8eb14cef2dd12720511f..ef44eaeeac71de8e5b83cf92fc0d9ff59b6e917a 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -1346,16 +1346,6 @@ void InstanceOfStub::Generate(MacroAssembler* masm) {
   __ tst(scratch, Operand(1 << Map::kHasNonInstancePrototype));
   __ b(ne, &slow_case);
 
-  // Ensure that {function} is not bound.
-  Register const shared_info = scratch;
-  __ ldr(shared_info,
-         FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset));
-  __ ldr(scratch, FieldMemOperand(shared_info,
-                                  SharedFunctionInfo::kCompilerHintsOffset));
-  __ tst(scratch,
-         Operand(Smi::FromInt(1 << SharedFunctionInfo::kBoundFunction)));
-  __ b(ne, &slow_case);
-
   // Get the "prototype" (or initial map) of the {function}.
   __ ldr(function_prototype,
          FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset));