Remove usage of to-be-deprecated APIs from v8 core

src/extensions/statistics-extension.cc

Index: src/extensions/statistics-extension.cc
diff --git a/src/extensions/statistics-extension.cc b/src/extensions/statistics-extension.cc
index d1bb0918403f6c02ca0983d1a723bac5432ac30d..7093625270ee35ac1d087bd0c222bc038a289cef 100644
--- a/src/extensions/statistics-extension.cc
+++ b/src/extensions/statistics-extension.cc
@@ -24,8 +24,11 @@ static void AddCounter(v8::Isolate* isolate,
                        StatsCounter* counter,
                        const char* name) {
   if (counter->Enabled()) {
-    object->Set(v8::String::NewFromUtf8(isolate, name),
-                v8::Number::New(isolate, *counter->GetInternalPointer()));
+    object->Set(isolate->GetCurrentContext(),
+                v8::String::NewFromUtf8(isolate, name, NewStringType::kNormal)
+                    .ToLocalChecked(),
+                v8::Number::New(isolate, *counter->GetInternalPointer()))
+        .FromJust();
   }
 }
 
@@ -33,8 +36,10 @@ static void AddNumber(v8::Isolate* isolate,
                       v8::Local<v8::Object> object,
                       intptr_t value,
                       const char* name) {
-  object->Set(v8::String::NewFromUtf8(isolate, name),
-              v8::Number::New(isolate, static_cast<double>(value)));
+  object->Set(isolate->GetCurrentContext(),
+              v8::String::NewFromUtf8(isolate, name, NewStringType::kNormal)
+                  .ToLocalChecked(),
+              v8::Number::New(isolate, static_cast<double>(value))).FromJust();
 }
 
 
@@ -42,8 +47,10 @@ static void AddNumber64(v8::Isolate* isolate,
                         v8::Local<v8::Object> object,
                         int64_t value,
                         const char* name) {
-  object->Set(v8::String::NewFromUtf8(isolate, name),
-              v8::Number::New(isolate, static_cast<double>(value)));
+  object->Set(isolate->GetCurrentContext(),
+              v8::String::NewFromUtf8(isolate, name, NewStringType::kNormal)
+                  .ToLocalChecked(),
+              v8::Number::New(isolate, static_cast<double>(value))).FromJust();
 }
 
 
@@ -54,7 +61,9 @@ void StatisticsExtension::GetCounters(
 
   if (args.Length() > 0) {  // GC if first argument evaluates to true.
     if (args[0]->IsBoolean() &&
-        args[0]->ToBoolean(args.GetIsolate())->Value()) {
+        args[0]
+            ->BooleanValue(args.GetIsolate()->GetCurrentContext())
+            .FromMaybe(false)) {
       heap->CollectAllGarbage(Heap::kNoGCFlags, "counters extension");
     }
   }