Remove the deprecated function ExtensionService::extensions().

chrome/browser/extensions/test_extension_service.cc

Index: chrome/browser/extensions/test_extension_service.cc
diff --git a/chrome/browser/extensions/test_extension_service.cc b/chrome/browser/extensions/test_extension_service.cc
index e8385e44d39d0f6d592bd2f1410055fa22dd8938..c5ae36a62cef0c5d814d1008b4c87459f0180a65 100644
--- a/chrome/browser/extensions/test_extension_service.cc
+++ b/chrome/browser/extensions/test_extension_service.cc
@@ -10,11 +10,6 @@ using extensions::Extension;
 
 TestExtensionService::~TestExtensionService() {}
 
-const extensions::ExtensionSet* TestExtensionService::extensions() const {
-  ADD_FAILURE();
-  return NULL;
-}
-
 extensions::PendingExtensionManager*
 TestExtensionService::pending_extension_manager() {
   ADD_FAILURE();