Three way experiment for "Show saved copy" button.

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 b992b2242177f9ef0df5d40a56f2fe9bf1a33994..30caba022081672bc010ee8342b72ebfee150add 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -473,11 +473,6 @@ const char kEnableOfflineAutoReload[]       = "enable-offline-auto-reload";
 const char kEnableOfflineAutoReloadVisibleOnly[] =
     "enable-offline-auto-reload-visible-only";
 
-// Enable/Disable offering a "Load stale copy" option to the user if offline.
-const char kEnableOfflineLoadStaleCache[]   = "enable-offline-load-stale-cache";
-const char kDisableOfflineLoadStaleCache[]  =
-    "disable-offline-load-stale-cache";
-
 // Enable the out of process PDF plugin.
 const char kEnableOutOfProcessPdf[]         = "enable-out-of-process-pdf";
 
@@ -1035,6 +1030,16 @@ const char kShowAppList[]                   = "show-app-list";
 // See kHideIcons.
 const char kShowIcons[]                     = "show-icons";
 
+// Command line flag offering a "Show saved copy" option to the user if offline.
+// The various modes are disabled, primary, or secondary. Primary/secondary
+// refers to button placement (for experiment).
+const char kShowSavedCopy[]                 = "show-saved-copy";
+
+// Values for the kShowSavedCopy flag.
+const char kEnableShowSavedCopyPrimary[]    = "primary";
+const char kEnableShowSavedCopySecondary[]  = "secondary";
+const char kDisableShowSavedCopy[]          = "disable";
+
 // Marks a renderer as the signin process.
 const char kSigninProcess[]                 = "signin-process";