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

Source/core/inspector/InspectorDebuggerAgent.cpp

Index: Source/core/inspector/InspectorDebuggerAgent.cpp
diff --git a/Source/core/inspector/InspectorDebuggerAgent.cpp b/Source/core/inspector/InspectorDebuggerAgent.cpp
index 039454cf29e1a1cefab61b66c075ca747cb71c76..4d87e80566a92c08f6c945c455f13303eec5a537 100644
--- a/Source/core/inspector/InspectorDebuggerAgent.cpp
+++ b/Source/core/inspector/InspectorDebuggerAgent.cpp
@@ -640,6 +640,16 @@ void InspectorDebuggerAgent::setVariableValue(ErrorString* errorString, int scop
     injectedScript.setVariableValue(errorString, m_currentCallStack, callFrameId, functionObjectId, scopeNumber, variableName, newValueString);
 }
 
+void InspectorDebuggerAgent::updateCallFrameScopes(ErrorString* error, const WTF::String& callFrameId, RefPtr<TypeBuilder::Array<TypeBuilder::Debugger::Scope> >& scopeChain)
+{
+    InjectedScript injectedScript = m_injectedScriptManager->injectedScriptForObjectId(callFrameId);
+    if (injectedScript.hasNoValue()) {
+        *error = "Inspected frame has gone";
+        return;
+    }
+    injectedScript.getCallFrameScopes(error, m_currentCallStack, callFrameId, &scopeChain);
+}
+
 void InspectorDebuggerAgent::scriptExecutionBlockedByCSP(const String& directiveText)
 {
     if (scriptDebugServer().pauseOnExceptionsState() != ScriptDebugServer::DontPauseOnExceptions) {