Support merged Dart-JS callstacks

Source/bindings/dart/DartScriptDebugServer.h

Index: Source/bindings/dart/DartScriptDebugServer.h
diff --git a/Source/bindings/dart/DartScriptDebugServer.h b/Source/bindings/dart/DartScriptDebugServer.h
index f94e1ac8305f992aa1b381e6ae6c6a36f99343c9..6c5002cbdc032e38abe6cf0ff7a7db332a058588 100644
--- a/Source/bindings/dart/DartScriptDebugServer.h
+++ b/Source/bindings/dart/DartScriptDebugServer.h
@@ -190,11 +190,11 @@ public:
     virtual void stepOverStatement();
     virtual void stepOutOfFunction();
 
-    virtual bool setScriptSource(const String& sourceID, const String& newContent, bool preview, String* error, RefPtr<TypeBuilder::Debugger::SetScriptSourceError>&, StackTrace* newCallFrames, RefPtr<JSONObject>* result);
+    virtual bool setScriptSource(const String& sourceID, const String& newContent, bool preview, String* error, RefPtr<TypeBuilder::Debugger::SetScriptSourceError>&, StackTraces* newCallFrames, RefPtr<JSONObject>* result);
     virtual ScriptCallFrame topCallFrameNoScopes();
     virtual int frameCount();
-    virtual StackTrace currentCallFrames();
-    virtual StackTrace currentCallFramesForAsyncStack();
+    virtual StackTraces currentCallFrames();
+    virtual StackTraces currentCallFramesForAsyncStack();
 
     virtual bool isPaused();
     virtual bool runningNestedMessageLoop() { return m_runningNestedMessageLoop; }
@@ -249,6 +249,7 @@ protected:
     bool m_breakpointsActivated;
     bool m_runningNestedMessageLoop;
     Dart_StackTrace m_executionState;
+    bool m_isPaused;
     Dart_Isolate m_pausedIsolate;
     Page* m_pausedPage;
     HashSet<Dart_Isolate> m_interruptCalled;
@@ -290,12 +291,12 @@ public:
     virtual void stepOverStatement();
     virtual void stepOutOfFunction();
 
-    virtual bool setScriptSource(const String& sourceID, const String& newContent, bool preview, String* error, RefPtr<TypeBuilder::Debugger::SetScriptSourceError>&, StackTrace* newCallFrames, RefPtr<JSONObject>* result);
+    virtual bool setScriptSource(const String& sourceID, const String& newContent, bool preview, String* error, RefPtr<TypeBuilder::Debugger::SetScriptSourceError>&, StackTraces* newCallFrames, RefPtr<JSONObject>* result);
 
     virtual ScriptCallFrame topCallFrameNoScopes();
     virtual int frameCount();
-    virtual StackTrace currentCallFrames();
-    virtual StackTrace currentCallFramesForAsyncStack();
+    virtual StackTraces currentCallFrames();
+    virtual StackTraces currentCallFramesForAsyncStack();
 
     virtual bool isPaused();
     virtual bool runningNestedMessageLoop();