Experimental 'purging and suspending' backgrounded tabs behind the flag

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 4061947e26511f2455ba2c8e414f46e0862b9dea..d517e7057a813c6e31d08c5b027e7c1a87e96632 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -1162,6 +1162,10 @@ void RenderProcessHostImpl::DecrementWorkerRefCount() {
     Cleanup();
 }
 
+void RenderProcessHostImpl::PurgeAndSuspend() {
+  Send(new ChildProcessMsg_PurgeAndSuspend());
+}
+
 void RenderProcessHostImpl::AddRoute(int32_t routing_id,
                                      IPC::Listener* listener) {
   CHECK(!listeners_.Lookup(routing_id)) << "Found Routing ID Conflict: "