[runtime] Introduce dedicated JSBoundFunction to represent bound functions.

src/full-codegen/arm/full-codegen-arm.cc

Index: src/full-codegen/arm/full-codegen-arm.cc
diff --git a/src/full-codegen/arm/full-codegen-arm.cc b/src/full-codegen/arm/full-codegen-arm.cc
index c34db15e163d2f07f51f8311f1f7f6cea25b6b20..69eb98d96156395cce99e1600dd292284d997479 100644
--- a/src/full-codegen/arm/full-codegen-arm.cc
+++ b/src/full-codegen/arm/full-codegen-arm.cc
@@ -3157,9 +3157,9 @@ void FullCodeGenerator::EmitIsFunction(CallRuntime* expr) {
                          &if_true, &if_false, &fall_through);
 
   __ JumpIfSmi(r0, if_false);
-  __ CompareObjectType(r0, r1, r2, JS_FUNCTION_TYPE);
+  __ CompareObjectType(r0, r1, r2, FIRST_FUNCTION_TYPE);
   PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
-  Split(eq, if_true, if_false, fall_through);
+  Split(hs, if_true, if_false, fall_through);
 
   context()->Plug(if_true, if_false);
 }