[stubs] Add IsCallableMap predicate to CSA

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index f997a997c9b288ed0891e3ecd5d2c235ea1a6999..12653fa843f5a497eeabc4f283b6cc1c932d2606 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -595,6 +595,8 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   compiler::Node* IsStringInstanceType(compiler::Node* instance_type);
   compiler::Node* IsJSReceiverInstanceType(compiler::Node* instance_type);
 
+  compiler::Node* IsCallableMap(compiler::Node* map);
+
   // String helpers.
   // Load a character from a String (might flatten a ConsString).
   compiler::Node* StringCharCodeAt(compiler::Node* string,