Support re-reading scope variables in protocol and on backed.

Source/core/inspector/JavaScriptCallFrame.h

Index: Source/core/inspector/JavaScriptCallFrame.h
diff --git a/Source/core/inspector/JavaScriptCallFrame.h b/Source/core/inspector/JavaScriptCallFrame.h
index b92fb13eef7e330716b666f95c56ea5471d923e5..6134cfe83a3979a848a659f50885f4711ad79b73 100644
--- a/Source/core/inspector/JavaScriptCallFrame.h
+++ b/Source/core/inspector/JavaScriptCallFrame.h
@@ -62,6 +62,7 @@ public:
     v8::Handle<v8::Value> evaluate(const String& expression);
     v8::Handle<v8::Value> restart();
     v8::Handle<v8::Value> setVariableValue(int scopeNumber, const String& variableName, v8::Handle<v8::Value> newValue);
+    void rereadScopes();
 
 private:
     JavaScriptCallFrame(v8::Handle<v8::Context> debuggerContext, v8::Handle<v8::Object> callFrame);