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

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index e105b2c85eef31e364872f0493bbc7b7c80be1d1..925e98c579d2692d177a8cece18e5216d84560a6 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -129,10 +129,10 @@ namespace {
 void RegisterExtensionManifestHandlers() {
   extensions::ManifestHandler::Register(
       extension_manifest_keys::kDevToolsPage,
-      new extensions::DevToolsPageHandler);
+      make_linked_ptr(new extensions::DevToolsPageHandler));
   extensions::ManifestHandler::Register(
       extension_manifest_keys::kWebAccessibleResources,
-      new extensions::WebAccessibleResourcesHandler);
+      make_linked_ptr(new extensions::WebAccessibleResourcesHandler));
 }
 
 static void AppendParams(const std::vector<string16>& additional_names,