Fix up unused includes from chrome/browser/extensions to the rest of chrome/browser.

chrome/browser/extensions/crx_installer_browsertest.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/browser/download/download_crx_util.h"
-#include "chrome/browser/download/download_service.h"
-#include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/extensions/crx_installer.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/extensions/feature_switch.h"
 #include "chrome/common/extensions/permissions/permission_set.h"
 #include "chrome/test/base/ui_test_utils.h"
+#include "content/public/browser/download_manager.h"
 #include "content/public/test/download_test_observer.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 class SkBitmap;
 
 namespace extensions {
 
 namespace {
 
@@ skipping 246 matching lines @@
       EXPECT_EQ(string16(), mock_prompt->error()) << kTestData[i];
     } else {
       EXPECT_EQ(l10n_util::GetStringUTF16(
           IDS_EXTENSION_INSTALL_DISALLOWED_ON_SITE),
           mock_prompt->error()) << kTestData[i];
     }
   }
 }
 
 }  // namespace extensions