remove Isolate::GetCurrent from Context api functions

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index 6e4e61d15e4b3f997b1ec56c51e98a670149f27f..614b16ea81896eab841d72e242b7722fc56eddaa 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -263,7 +263,8 @@ PerIsolateData::RealmScope::RealmScope(PerIsolateData* data) : data_(data) {
   data_->realm_current_ = 0;
   data_->realm_switch_ = 0;
   data_->realms_ = new Persistent<Context>[1];
-  data_->realms_[0].Reset(data_->isolate_, Context::GetEntered());
+  data_->realms_[0].Reset(data_->isolate_,
+                          data_->isolate_->GetEnteredContext());
   data_->realm_shared_.Clear();
 }
 
@@ -290,7 +291,7 @@ int PerIsolateData::RealmFind(Handle<Context> context) {
 void Shell::RealmCurrent(const v8::FunctionCallbackInfo<v8::Value>& args) {
   Isolate* isolate = args.GetIsolate();
   PerIsolateData* data = PerIsolateData::Get(isolate);
-  int index = data->RealmFind(Context::GetEntered());
+  int index = data->RealmFind(isolate->GetEnteredContext());
   if (index == -1) return;
   args.GetReturnValue().Set(index);
 }