Ignore show messages from RemoteFrames when the WebContents is hidden.

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 1933 matching lines @@
 }
 
 void WebContentsImpl::ForwardCompositorProto(
     RenderWidgetHostImpl* render_widget_host,
     const std::vector<uint8_t>& proto) {
   if (delegate_)
     delegate_->ForwardCompositorProto(render_widget_host, proto);
 }
 
 void WebContentsImpl::OnRenderFrameProxyVisibilityChanged(bool visible) {
-  if (visible)
+  if (visible && !GetOuterWebContents()->IsHidden())
     WasShown();
-  else
+  else if (!visible)
     WasHidden();
 }
 
 void WebContentsImpl::CreateNewWindow(
     SiteInstance* source_site_instance,
     int32_t route_id,
     int32_t main_frame_route_id,
     int32_t main_frame_widget_route_id,
     const ViewHostMsg_CreateWindow_Params& params,
     SessionStorageNamespace* session_storage_namespace) {
@@ skipping 3203 matching lines @@
   for (RenderViewHost* render_view_host : render_view_host_set)
     render_view_host->OnWebkitPreferencesChanged();
 }
 
 void WebContentsImpl::SetJavaScriptDialogManagerForTesting(
     JavaScriptDialogManager* dialog_manager) {
   dialog_manager_ = dialog_manager;
 }
 
 }  // namespace content