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

Source/core/inspector/InjectedScript.cpp

Index: Source/core/inspector/InjectedScript.cpp
diff --git a/Source/core/inspector/InjectedScript.cpp b/Source/core/inspector/InjectedScript.cpp
index 43422c81e7ef91e51949836cbe5a242952142a5a..c0b56701bb7b59068359216ef52b055343221347 100644
--- a/Source/core/inspector/InjectedScript.cpp
+++ b/Source/core/inspector/InjectedScript.cpp
@@ -142,6 +142,22 @@ void InjectedScript::setVariableValue(ErrorString* errorString, const ScriptValu
     // Normal return.
 }
 
+void InjectedScript::getCallFrameScopes(ErrorString* errorString, const ScriptValue& callFrames, const String& callFrameId, RefPtr<TypeBuilder::Array<TypeBuilder::Debugger::Scope> >* result)
+{
+    ScriptFunctionCall function(injectedScriptObject(), "getCallFrameScopes");
+    function.appendArgument(callFrames);
+    function.appendArgument(callFrameId);
+    RefPtr<JSONValue> resultValue;
+    makeCall(function, &resultValue);
+    if (!resultValue || resultValue->type() != JSONValue::TypeArray) {
+        if (!resultValue->asString(errorString))
+            *errorString = "Internal error";
+        return;
+    }
+    *result = TypeBuilder::Array<TypeBuilder::Debugger::Scope>::runtimeCast(resultValue);
+}
+
+
 void InjectedScript::getFunctionDetails(ErrorString* errorString, const String& functionId, RefPtr<FunctionDetails>* result)
 {
     ScriptFunctionCall function(injectedScriptObject(), "getFunctionDetails");