Experimental 'purging and suspending' backgrounded tabs behind the flag

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 3a833f8880afc94325658918577290eaf49a2430..0d268b7904386f2aa2a1d970fe34f92c30dc121d 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -874,6 +874,12 @@ const char kProxyPacUrl[]                   = "proxy-pac-url";
 // highest priority.
 const char kProxyServer[]                   = "proxy-server";
 
+// Specifies the time for tab purging and suspending. When the indicated time
+// passes after a tab goes backgrounded, the backgrounded tab is purged and
+// suspended to save memory usage. The default value is "0" and purging and
+// suspending never happen.
+const char kPurgeAndSuspendTime[]           = "purge-and-suspend-time";
+
 // Specifies a comma separated list of QUIC connection options to send to
 // the server.
 const char kQuicConnectionOptions[]         = "quic-connection-options";