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 82c9410cd4a3563db571824175ef32cda8117afd..bbb0ceed8db67d065279c4102c9a3371fcd97fbe 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -473,10 +473,12 @@ 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/Disable offering a "Show saved copy" option to the user if offline.
+// Primary/Secondary refers to button placement (for experiment).
+const char kEnableShowSavedCopyPrimary[]   = "enabled-show-saved-copy-primary";
+const char kEnableShowSavedCopySecondary[] =
+    "enabled-show-saved-copy-secondary";
+const char kDisableShowSavedCopy[]         = "disable-show-saved-copy";
 
 // Enable the out of process PDF plugin.
 const char kEnableOutOfProcessPdf[]         = "enable-out-of-process-pdf";