Fire visibilityChange event on out-of-process iframes.

content/browser/frame_host/render_frame_host_manager.cc

Index: content/browser/frame_host/render_frame_host_manager.cc
diff --git a/content/browser/frame_host/render_frame_host_manager.cc b/content/browser/frame_host/render_frame_host_manager.cc
index 506cbcb406afa97d6d832ba94eeec3fde328777e..5380f6e33504c7018c565df46737ac3248172cbf 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -1768,7 +1768,8 @@ int RenderFrameHostManager::CreateRenderFrameProxy(SiteInstance* instance) {
   if (!render_view_host) {
     CHECK(frame_tree_node_->IsMainFrame());
     render_view_host = frame_tree_node_->frame_tree()->CreateRenderViewHost(
-        instance, MSG_ROUTING_NONE, MSG_ROUTING_NONE, true, true);
+        instance, MSG_ROUTING_NONE, MSG_ROUTING_NONE, true,
+        delegate_->IsHidden());
   }
 
   RenderFrameProxyHost* proxy = GetRenderFrameProxyHost(instance);