Small cleanup to extension function registration to avoid scattered definitions.

chrome/browser/extensions/extension_toolstrip_api.cc

Index: chrome/browser/extensions/extension_toolstrip_api.cc
diff --git a/chrome/browser/extensions/extension_toolstrip_api.cc b/chrome/browser/extensions/extension_toolstrip_api.cc
index 492c7307088527dc55dc4ac8aae5505471fb122c..58950ae2d1c3b3bb321de7a92c879bbf4d6249c7 100644
--- a/chrome/browser/extensions/extension_toolstrip_api.cc
+++ b/chrome/browser/extensions/extension_toolstrip_api.cc
@@ -13,11 +13,6 @@
 #include "chrome/browser/extensions/extension_tabs_module_constants.h"
 #include "chrome/browser/profile.h"
 
-namespace extension_toolstrip_api_functions {
-const char kExpandFunction[] = "toolstrip.expand";
-const char kCollapseFunction[] = "toolstrip.collapse";
-};  // namespace extension_toolstrip_api_functions
-
 namespace extension_toolstrip_api_events {
 const char kOnToolstripExpanded[] = "toolstrip.onExpanded.%d";
 const char kOnToolstripCollapsed[] = "toolstrip.onCollapsed.%d";