Lower the priority of shared workers

content/browser/browser_child_process_host_impl.h

Index: content/browser/browser_child_process_host_impl.h
diff --git a/content/browser/browser_child_process_host_impl.h b/content/browser/browser_child_process_host_impl.h
index e3fdcb57c1eca5dff355302d22cb4c531c44d033..9933ca34949612826dbb2f71426091437c2d072a 100644
--- a/content/browser/browser_child_process_host_impl.h
+++ b/content/browser/browser_child_process_host_impl.h
@@ -61,6 +61,9 @@ class CONTENT_EXPORT BrowserChildProcessHostImpl
   // Removes this host from the host list. Calls ChildProcessHost::ForceShutdown
   void ForceShutdown();
 
+  // Callers can reduce the BrowserChildProcess' priority.
+  void SetBackgrounded(bool backgrounded);
+
   // Controls whether the child process should be terminated on browser
   // shutdown. Default is to always terminate.
   void SetTerminateChildOnShutdown(bool terminate_on_shutdown);