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

chrome/common/extensions/api/commands/commands_manifest_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/extensions/manifest_tests/extension_manifest_test.h"
 
 #include "base/command_line.h"
 #include "base/string_util.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/api/commands/commands_handler.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/common/extensions/manifest_handler.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace errors = extension_manifest_errors;
 
 namespace extensions {
 
 class CommandsManifestTest : public ExtensionManifestTest {
  protected:
   virtual void SetUp() OVERRIDE {
     ManifestHandler::Register(extension_manifest_keys::kCommands,
-                              new CommandsHandler);
+                              make_linked_ptr(new CommandsHandler));
   }
 };
 
 TEST_F(CommandsManifestTest, CommandManifestSimple) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
 
 #if defined(OS_MACOSX)
   int ctrl = ui::EF_COMMAND_DOWN;
 #else
@@ skipping 54 matching lines @@
 
 TEST_F(CommandsManifestTest, CommandManifestRejectJustShift) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
 
   LoadAndExpectError("command_reject_just_shift.json",
       errors::kInvalidKeyBinding);
 }
 
 }  // namespace extensions