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 f7ab36416b527bacf999cbafd46a3fa0eeaed671..16857ee0f4e76db1ba0c46b09e09add66a29eaf5 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -620,6 +620,9 @@ 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";