Remove usage of deprecated APIs from cctests

test/cctest/test-deoptimization.cc

Index: test/cctest/test-deoptimization.cc
diff --git a/test/cctest/test-deoptimization.cc b/test/cctest/test-deoptimization.cc
index c9200edf0e49508b7ea53d8c1f77425f41d8912c..4b69612f5f2dca4b54b92bc137a4fb3a9dcc238f 100644
--- a/test/cctest/test-deoptimization.cc
+++ b/test/cctest/test-deoptimization.cc
@@ -235,8 +235,8 @@ TEST(DeoptimizeRecursive) {
   CHECK_EQ(11, env->Global()->Get(v8_str("calls"))->Int32Value());
   CHECK_EQ(0, Deoptimizer::GetDeoptimizedCodeCount(CcTest::i_isolate()));
 
-  v8::Local<v8::Function> fun =
-      v8::Local<v8::Function>::Cast(env->Global()->Get(v8::String::New("f")));
+  v8::Local<v8::Function> fun = v8::Local<v8::Function>::Cast(
+      env->Global()->Get(v8::String::NewFromUtf8(CcTest::isolate(), "f")));
   CHECK(!fun.IsEmpty());
 }