Valgrind cleanliness, part 5: Delete extensions on exit.

src/extensions/externalize-string-extension.cc

Index: src/extensions/externalize-string-extension.cc
diff --git a/src/extensions/externalize-string-extension.cc b/src/extensions/externalize-string-extension.cc
index 9fbf3298189acdace28f175af3f855b5ae13bd68..50d876136f2d08514eb446ccf6ac4652ed68d384 100644
--- a/src/extensions/externalize-string-extension.cc
+++ b/src/extensions/externalize-string-extension.cc
@@ -133,11 +133,8 @@ v8::Handle<v8::Value> ExternalizeStringExtension::IsAscii(
 
 
 void ExternalizeStringExtension::Register() {
-  static ExternalizeStringExtension* externalize_extension = NULL;
-  if (externalize_extension == NULL)
-    externalize_extension = new ExternalizeStringExtension;
-  static v8::DeclareExtension externalize_extension_declaration(
-      externalize_extension);
+  static ExternalizeStringExtension externalize_extension;
+  static v8::DeclareExtension declaration(&externalize_extension);
 }
 
 } }  // namespace v8::internal