Experimental 'purging and suspending' backgrounded tabs behind the flag

content/test/fake_renderer_scheduler.cc

Index: content/test/fake_renderer_scheduler.cc
diff --git a/content/test/fake_renderer_scheduler.cc b/content/test/fake_renderer_scheduler.cc
index 27eb277c12be960f043e80803911b61e41de4f29..61b2e59efbe61ba4a2f3e22fb41faa6d5aaa23c9 100644
--- a/content/test/fake_renderer_scheduler.cc
+++ b/content/test/fake_renderer_scheduler.cc
@@ -86,6 +86,9 @@ void FakeRendererScheduler::OnRendererBackgrounded() {
 void FakeRendererScheduler::OnRendererForegrounded() {
 }
 
+void FakeRendererScheduler::SuspendRenderer() {
+}
+
 void FakeRendererScheduler::AddPendingNavigation(
     blink::WebScheduler::NavigatingFrameType type) {
 }