Ignore show messages from RemoteFrames when the WebContents is hidden.

content/browser/frame_host/cross_process_frame_connector.cc

 // Copyright 2014 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/frame_host/cross_process_frame_connector.h"
 
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_manager.h"
 #include "content/browser/compositor/surface_utils.h"
 #include "content/browser/frame_host/frame_tree.h"
@@ skipping 258 matching lines @@
   // Show/Hide on all the RenderWidgetHostViews (including this) one.
   if (frame_proxy_in_parent_renderer_->frame_tree_node()
           ->render_manager()
           ->ForInnerDelegate()) {
     RenderWidgetHostImpl::From(view_->GetRenderWidgetHost())
         ->delegate()
         ->OnRenderFrameProxyVisibilityChanged(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) {
   device_scale_factor_ = scale_factor;
   // The RenderWidgetHost is null in unit tests.
   if (view_ && view_->GetRenderWidgetHost()) {
     RenderWidgetHostImpl* child_widget =
         RenderWidgetHostImpl::From(view_->GetRenderWidgetHost());
     child_widget->NotifyScreenInfoChanged();
   }
@@ skipping 53 matching lines @@
 
   if (parent) {
     return static_cast<RenderWidgetHostViewBase*>(
         parent->current_frame_host()->GetView());
   }
 
   return nullptr;
 }
 
 }  // namespace content