[DevTools] Avoid current_ and pending_ being the same host in RenderFrameDevToolsAgentHost.

content/browser/devtools/render_frame_devtools_agent_host.h

Index: content/browser/devtools/render_frame_devtools_agent_host.h
diff --git a/content/browser/devtools/render_frame_devtools_agent_host.h b/content/browser/devtools/render_frame_devtools_agent_host.h
index d32869417df04b991bd54f51c981573926a88628..2a1350f04fdf354a2b6fe372f85a06851be48429 100644
--- a/content/browser/devtools/render_frame_devtools_agent_host.h
+++ b/content/browser/devtools/render_frame_devtools_agent_host.h
@@ -162,6 +162,8 @@ class CONTENT_EXPORT RenderFrameDevToolsAgentHost
   void OnRequestNewWindow(RenderFrameHost* sender, int new_routing_id);
   void DestroyOnRenderFrameGone();
 
+  bool CheckConsistency();
+
   void CreatePowerSaveBlocker();
 
   class FrameHostHolder;
@@ -193,6 +195,7 @@ class CONTENT_EXPORT RenderFrameDevToolsAgentHost
   std::unique_ptr<device::PowerSaveBlocker> power_save_blocker_;
 #endif
   std::unique_ptr<DevToolsProtocolHandler> protocol_handler_;
+  RenderFrameHostImpl* handlers_frame_host_;
   bool current_frame_crashed_;
 
   // PlzNavigate