Added new adaptive "Suggest" tab on the New Tab Page, behing the flag, for the experiments.

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 98a33088124d0ffc4fd9824d230a3d8d8f7910f1..80ffde7a88acff73016f6dfc10abbe7196feee25 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -546,6 +546,9 @@ const char kEnableRestoreSessionState[]   = "enable-restore-session-state";
 // supported server-side for searches on google.com.
 const char kEnableSdch[]                    = "enable-sdch";
 
+// Enables experimental suggested pane in New Tab page.
+const char kEnableSuggestionsTabPage[]      = "enable-suggested-ntp";
+
 // Enables syncing extension settings.
 const char kEnableSyncExtensionSettings[]   = "enable-sync-extension-settings";