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

chrome/browser/chromeos/extensions/file_browser_manifest_unittest.cc

Index: chrome/browser/chromeos/extensions/file_browser_manifest_unittest.cc
diff --git a/chrome/browser/chromeos/extensions/file_browser_manifest_unittest.cc b/chrome/browser/chromeos/extensions/file_browser_manifest_unittest.cc
index fe402957a7ff8109e42b80690c7ae3775b0418b6..2cb936a97dbe62210ea729217b0f789d0983f6d8 100644
--- a/chrome/browser/chromeos/extensions/file_browser_manifest_unittest.cc
+++ b/chrome/browser/chromeos/extensions/file_browser_manifest_unittest.cc
@@ -27,10 +27,10 @@ class FileBrowserHandlerManifestTest : public ExtensionManifestTest {
     ExtensionManifestTest::SetUp();
     extensions::ManifestHandler::Register(
         extension_manifest_keys::kFileBrowserHandlers,
-        new FileBrowserHandlerParser);
+        make_linked_ptr(new FileBrowserHandlerParser));
     extensions::ManifestHandler::Register(
-        keys::kChromeURLOverrides,
-        new extensions::URLOverridesHandler);
+        extension_manifest_keys::kChromeURLOverrides,
+        make_linked_ptr(new extensions::URLOverridesHandler));
   }
 };