Various extension-related cleanup and simplifications.

src/extensions/trigger-failure-extension.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 58 matching lines @@
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   ASSERT(false);
 }
 
 
 void TriggerFailureExtension::TriggerSlowAssertFalse(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   SLOW_ASSERT(false);
 }
 
-
-void TriggerFailureExtension::Register() {
-  static TriggerFailureExtension trigger_failure_extension;
-  static v8::DeclareExtension declaration(&trigger_failure_extension);
-}
-
 } }  // namespace v8::internal