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

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 5fdcde9e112fd7d96840b6ba37a5e17d14400a95..c9b7026866fadb176f1bd83f28cba832700200fd 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -755,6 +755,13 @@ const Experiment kExperiments[] = {
     SINGLE_VALUE_TYPE(switches::kEnableNewOobe),
   },
 #endif
+  {
+    "enable-tab-mru-switch",
+    IDS_FLAGS_ENABLE_TAB_MRU_SWITCH,
+    IDS_FLAGS_ENABLE_TAB_MRU_SWITCH_DESCRIPTION,
+    kOsLinux,
+    SINGLE_VALUE_TYPE(switches::kEnableTabMRUSwitch),
+  },
 };
 
 const Experiment* experiments = kExperiments;