[builtins] add CodeStubAssembler::IsDebugActive() helper

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 2a68c37c6ef50812ede7f90f2700c4bdca742fb8..e19b34dd6198d0db9a30d5d1208e6aadd8a7743a 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -1044,6 +1044,9 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   compiler::Node* InstanceOf(compiler::Node* object, compiler::Node* callable,
                              compiler::Node* context);
 
+  // Debug helpers
+  compiler::Node* IsDebugActive();
+
   // TypedArray/ArrayBuffer helpers
   compiler::Node* IsDetachedBuffer(compiler::Node* buffer);