Implementation for switching between recently used tabs using ctrl tilde or quoteleft.

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 66c0b513de80636b5c0296d197b160eb12a69063..3077587aa9b0d70566800aa5602b8184800aab5b 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -603,6 +603,9 @@ const char kEnableSpdy3[]                   = "enable-spdy3";
 // Enables the stacked tabstrip.
 const char kEnableStackedTabStrip[]         = "enable-stacked-tab-strip";
 
+// Enables switching between most recently used tabs using ctrl+tilde
+const char kEnableTabMRUSwitch[]            = "enable-tab-mru-switch";
+
 // Enables experimental suggestions pane in New Tab page.
 const char kEnableSuggestionsTabPage[]      = "enable-suggestions-ntp";