Do not use deprecated API in cctest/test-debug.

test/cctest/cctest.h

Index: test/cctest/cctest.h
diff --git a/test/cctest/cctest.h b/test/cctest/cctest.h
index 4cfb8b0d7075d94f1d64f3cc44bb6e84c027895d..6243ac5327d0e2a6ccb98ac7d99d93d10bec7b82 100644
--- a/test/cctest/cctest.h
+++ b/test/cctest/cctest.h
@@ -341,6 +341,13 @@ static inline v8::Local<v8::String> v8_str(const char* x) {
 }
 
 
+static inline v8::Local<v8::String> v8_str(v8::Isolate* isolate,
+                                           const char* x) {
+  return v8::String::NewFromUtf8(isolate, x, v8::NewStringType::kNormal)
+      .ToLocalChecked();
+}
+
+
 static inline v8::Local<v8::Symbol> v8_symbol(const char* name) {
   return v8::Symbol::New(v8::Isolate::GetCurrent(), v8_str(name));
 }
@@ -392,6 +399,18 @@ static inline v8::MaybeLocal<v8::Value> CompileRun(
 }
 
 
+static inline v8::Local<v8::Value> CompileRunChecked(v8::Isolate* isolate,
+                                                     const char* source) {
+  v8::Local<v8::String> source_string =
+      v8::String::NewFromUtf8(isolate, source, v8::NewStringType::kNormal)
+          .ToLocalChecked();
+  v8::Local<v8::Context> context = isolate->GetCurrentContext();
+  v8::Local<v8::Script> script =
+      v8::Script::Compile(context, source_string).ToLocalChecked();
+  return script->Run(context).ToLocalChecked();
+}
+
+
 static inline v8::Local<v8::Value> CompileRun(v8::Local<v8::String> source) {
   v8::Local<v8::Value> result;
   if (v8_compile(source)