[inspector] provide more usefull error message for non serializable value

src/inspector/V8DebuggerAgentImpl.cpp

Index: src/inspector/V8DebuggerAgentImpl.cpp
diff --git a/src/inspector/V8DebuggerAgentImpl.cpp b/src/inspector/V8DebuggerAgentImpl.cpp
index 58bcd610c3cdcf163be85753bffea2f7de8b9380..1bd4ae5833d17d3b104ac04b55f169e562dfce0c 100644
--- a/src/inspector/V8DebuggerAgentImpl.cpp
+++ b/src/inspector/V8DebuggerAgentImpl.cpp
@@ -1014,7 +1014,8 @@ std::unique_ptr<Array<CallFrame>> V8DebuggerAgentImpl::currentCallFrames(
 
   protocol::ErrorSupport errorSupport;
   std::unique_ptr<Array<CallFrame>> callFrames = Array<CallFrame>::parse(
-      toProtocolValue(debuggerContext, objects).get(), &errorSupport);
+      toProtocolValue(errorString, debuggerContext, objects).get(),

[dgozman, 2016/09/19 17:35:06]

Should check the result of toProtocolValue and return it's errorString.

[kozy, 2016/09/20 15:34:27]

Done.

+      &errorSupport);
   if (hasInternalError(errorString, !callFrames))
     return Array<CallFrame>::create();
   return callFrames;