Add a new field trial for Instant.

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 0fb27145080c23f109a3954da6ac306f76c32825..957348cea0e006c2b36565883970e58935778c08 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -712,6 +712,8 @@ const char kInstantFieldTrialHidden[]       = "hidden";
 const char kInstantFieldTrialInstant[]      = "instant";
 // The field trial is forced into the SILENT_EXPERIMENT group.
 const char kInstantFieldTrialSilent[]       = "silent";
+// The field trial is forced into the SUGGEST_EXPERIMENT group.
+const char kInstantFieldTrialSuggest[]      = "suggest";
 
 // URL to use for instant. If specified this overrides the url from the
 // TemplateURL.