Ignore show messages from RemoteFrames when the WebContents is hidden.

content/browser/frame_host/cross_process_frame_connector.cc

Index: content/browser/frame_host/cross_process_frame_connector.cc
diff --git a/content/browser/frame_host/cross_process_frame_connector.cc b/content/browser/frame_host/cross_process_frame_connector.cc
index 4b3c12d691e34cd3cf3e0626129cbe609043127d..5ee851727a0e0a25704f064a089ab69d52df2a1a 100644
--- a/content/browser/frame_host/cross_process_frame_connector.cc
+++ b/content/browser/frame_host/cross_process_frame_connector.cc
@@ -276,10 +276,14 @@ void CrossProcessFrameConnector::OnVisibilityChanged(bool visible) {
     return;
   }
 
-  if (visible)
+  if (visible &&
+      !RenderWidgetHostImpl::From(view_->GetRenderWidgetHost())
+           ->delegate()
+           ->IsHidden()) {
     view_->Show();
-  else
+  } else if (!visible) {
     view_->Hide();
+  }
 }
 
 void CrossProcessFrameConnector::SetDeviceScaleFactor(float scale_factor) {