Support merged Dart-JS callstacks

Source/bindings/v8/ScriptDebugServer.cpp

Index: Source/bindings/v8/ScriptDebugServer.cpp
diff --git a/Source/bindings/v8/ScriptDebugServer.cpp b/Source/bindings/v8/ScriptDebugServer.cpp
index 0c61ce7494e9737c677e1026a26de1b3585053ff..8b69e9ca14cf05d64aa9f71c341b2dd765585648 100644
--- a/Source/bindings/v8/ScriptDebugServer.cpp
+++ b/Source/bindings/v8/ScriptDebugServer.cpp
@@ -345,20 +345,26 @@ PassRefPtrWillBeRawPtr<JavaScriptCallFrame> ScriptDebugServer::wrapCallFrames(in
 StackTrace ScriptDebugServer::currentCallFramesInner(ScopeInfoDetails scopeDetails)
 {
     if (!m_isolate->InContext())
-        return StackTrace(ScriptValue());
+        return StackTrace();
     v8::HandleScope handleScope(m_isolate);
 
     RefPtrWillBeRawPtr<JavaScriptCallFrame> currentCallFrame = wrapCallFrames(0, scopeDetails);
     if (!currentCallFrame)
-        return StackTrace(ScriptValue());
+        return StackTrace();
 
     V8ScriptState* scriptState = m_pausedScriptState ? m_pausedScriptState->v8ScriptState() : V8ScriptState::current(m_isolate);
     V8ScriptState::Scope scope(scriptState);
-    return StackTrace(ScriptValue(scriptState, toV8(currentCallFrame.release(), scriptState->context()->Global(), m_isolate)));
+    return StackTrace(ScriptValue(scriptState, toV8(currentCallFrame.release(), scriptState->context()->Global(), m_isolate)), scriptState);
 }
 
+
 StackTrace ScriptDebugServer::currentCallFrames()
 {
+    return StackTrace(currentCallFramesForVm(), m_peer->currentCallFramesForVm());
+}
+
+StackTrace ScriptDebugServer::currentCallFramesForVm()
+{
     return currentCallFramesInner(AllScopes);
 }