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 03fbb91981f936f725feb6a36fdecb759f905b14..30fd4a338c3e46ae5a7194699cc4e7903768cb8c 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -855,6 +855,15 @@ const Experiment kExperiments[] = {
     SINGLE_VALUE_TYPE(ash::switches::kAshDebugShortcuts),
   },
 #endif
+#if defined(OS_LINUX)
+  {
+    "enable-tab-mru-switch",
+    IDS_FLAGS_ENABLE_TAB_MRU_SWITCH,
+    IDS_FLAGS_ENABLE_TAB_MRU_SWITCH_DESCRIPTION,
+    kOsLinux,
+    SINGLE_VALUE_TYPE(switches::kEnableTabMRUSwitch),
+  },
+#endif
 };
 
 const Experiment* experiments = kExperiments;