Allow manifest handlers to declare keys they depend on that must be parsed before them.

chrome/browser/extensions/sandboxed_unpacker_unittest.cc

Index: chrome/browser/extensions/sandboxed_unpacker_unittest.cc
diff --git a/chrome/browser/extensions/sandboxed_unpacker_unittest.cc b/chrome/browser/extensions/sandboxed_unpacker_unittest.cc
index df63f7b24684a5e7f8b64c09dcb888a1e07e9455..7583fc6741059339ae7dd294259c660ff2e50d02 100644
--- a/chrome/browser/extensions/sandboxed_unpacker_unittest.cc
+++ b/chrome/browser/extensions/sandboxed_unpacker_unittest.cc
@@ -69,7 +69,7 @@ class SandboxedUnpackerTest : public testing::Test {
     client_->DelegateToFake();
     extensions::ManifestHandler::Register(
         extension_manifest_keys::kDefaultLocale,
-        new extensions::DefaultLocaleHandler);
+        make_linked_ptr(new extensions::DefaultLocaleHandler));
   }
 
   virtual void TearDown() {