[inspector] Store interger in context embedder data instead of a string.

src/inspector/v8-runtime-agent-impl.cc

Index: src/inspector/v8-runtime-agent-impl.cc
diff --git a/src/inspector/v8-runtime-agent-impl.cc b/src/inspector/v8-runtime-agent-impl.cc
index a0fb22d6f7d7d56f4fbebb1a6014cdbb98e98e20..b40f08ed065f366302cb196d4566e11f4acfc904 100644
--- a/src/inspector/v8-runtime-agent-impl.cc
+++ b/src/inspector/v8-runtime-agent-impl.cc
@@ -241,7 +241,7 @@ Response ensureContext(V8InspectorImpl* inspector, int contextGroupId,
         inspector->client()->ensureDefaultContextInGroup(contextGroupId);
     if (defaultContext.IsEmpty())
       return Response::Error("Cannot find default execution context");
-    *contextId = V8Debugger::contextId(defaultContext);
+    *contextId = InspectedContext::contextId(defaultContext);
   }
   return Response::OK();
 }