Fix remote debugger crash.

src/d8-debug.cc

Index: src/d8-debug.cc
diff --git a/src/d8-debug.cc b/src/d8-debug.cc
index 1cbc0b39a018db7495aa8763d10853bffe5e9695..56f11a732137792a2aef8dc3706631c5f318cc8b 100644
--- a/src/d8-debug.cc
+++ b/src/d8-debug.cc
@@ -159,8 +159,8 @@ void HandleDebugEvent(DebugEvent event,
 }
 
 
-void RunRemoteDebugger(int port) {
-  RemoteDebugger debugger(port);
+void RunRemoteDebugger(int port, Handle<Context> context) {
+  RemoteDebugger debugger(port, context);
   debugger.Run();
 }
 
@@ -274,6 +274,7 @@ RemoteDebuggerEvent* RemoteDebugger::GetEvent() {
 
 void RemoteDebugger::HandleMessageReceived(char* message) {
   Locker lock;
+  Context::Scope cscope(context_);
   HandleScope scope;
 
   // Print the event details.
@@ -303,6 +304,7 @@ void RemoteDebugger::HandleMessageReceived(char* message) {
 
 void RemoteDebugger::HandleKeyboardCommand(char* command) {
   Locker lock;
+  Context::Scope cscope(context_);
   HandleScope scope;
 
   // Convert the debugger command to a JSON debugger request.