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

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 6945e95b5ef7f0e83eb4b5b2bcc41d8c0fb6e077..c6272c338deebf2bc71e4a9c3f7b2265fdbf1b7f 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -16324,7 +16324,14 @@ Battery full
       When enabled, will use ClientOAuth to connect a profile to a Google account.  Otherwise ClientLogin is used.
       ClientOAuth permits using OTPs instead of ASPs to during authentication.
     </message>
-      
+
+    <message name="IDS_FLAGS_ENABLE_TAB_MRU_SWITCH" desc="Name of about:flag option to turn on the feature to switch between most recently used tabs using ctrl+tilde">
+      Enable Tab MRU Switching
+    </message>
+    <message name="IDS_FLAGS_ENABLE_TAB_MRU_SWITCH_DESCRIPTION" desc="Name of about:flag option to turn on the feature to switch between most recently used tabs using ctrl+tilde">
+      This feature will enable user to switch between most recently used tabs using ctrl + tilde.
+    </message>
+
     </messages>
     <structures fallback_to_english="true">
       <!-- Make sure these stay in sync with the structures in generated_resources.grd. -->