Don't allow a renderer to exit if we are using it in other views.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 793163b8e8dfe93ce1eda3d97370d1e6ef31ad81..508228cf6cb383428f6fb3cc0223539a2ca59f02 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -1250,8 +1250,9 @@ void RenderProcessHostImpl::ProcessDied(base::ProcessHandle handle,
 }
 
 void RenderProcessHostImpl::OnShutdownRequest() {
-  // Don't shutdown if there are pending RenderViews being swapped back in.
-  if (pending_views_)
+  // Don't shut down if there are more RenderViews than the one asking to
+  // close, or if there are pending RenderViews being swapped back in.
+  if (pending_views_ || render_widget_hosts_.size() > 1)
     return;
 
   // Notify any tabs that might have swapped out renderers from this process.