Factor Chrome details out of update manifest fetching.

chrome/browser/extensions/updater/chrome_extension_downloader_factory.cc

Index: chrome/browser/extensions/updater/chrome_extension_downloader_factory.cc
diff --git a/chrome/browser/extensions/updater/chrome_extension_downloader_factory.cc b/chrome/browser/extensions/updater/chrome_extension_downloader_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9ca870f357c1b9b4bad5fedfbfc1667caba126d1
--- /dev/null
+++ b/chrome/browser/extensions/updater/chrome_extension_downloader_factory.cc
@@ -0,0 +1,54 @@
+// Copyright 2014 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/extensions/updater/chrome_extension_downloader_factory.h"
+
+#include "chrome/browser/extensions/updater/extension_downloader.h"
+#include "chrome/browser/metrics/chrome_metrics_service_accessor.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/signin/profile_identity_provider.h"
+#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
+#include "chrome/browser/signin/signin_manager_factory.h"
+#include "chrome/browser/ui/webui/signin/login_ui_service_factory.h"
+#include "components/omaha_query_params/omaha_query_params.h"
+#include "components/signin/core/browser/signin_manager.h"
+#include "google_apis/gaia/identity_provider.h"
+
+using extensions::ExtensionDownloader;
+using extensions::ExtensionDownloaderDelegate;
+using omaha_query_params::OmahaQueryParams;
+
+scoped_ptr<ExtensionDownloader>
+ChromeExtensionDownloaderFactory::CreateForRequestContext(
+    net::URLRequestContextGetter* request_context,
+    ExtensionDownloaderDelegate* delegate) {
+  scoped_ptr<ExtensionDownloader> downloader(
+      new ExtensionDownloader(delegate, request_context));
+#if defined(GOOGLE_CHROME_BUILD)
+  std::string brand;
+  google_brand::GetBrand(&brand);
+  if (!brand.empty() && !google_brand::IsOrganic(brand))
+    downloader->set_brand_code(brand);
+#endif  // defined(GOOGLE_CHROME_BUILD)
+  downloader->set_manifest_query_params(
+      OmahaQueryParams::Get(OmahaQueryParams::CRX));
+  downloader->set_ping_enabled_domain("google.com");
+  downloader->set_enable_extra_update_metrics(
+      ChromeMetricsServiceAccessor::IsMetricsReportingEnabled());
+  return downloader.Pass();
+}
+
+scoped_ptr<ExtensionDownloader>
+ChromeExtensionDownloaderFactory::CreateForProfile(
+    Profile* profile,
+    ExtensionDownloaderDelegate* delegate) {
+  scoped_ptr<IdentityProvider> identity_provider(new ProfileIdentityProvider(
+      SigninManagerFactory::GetForProfile(profile),
+      ProfileOAuth2TokenServiceFactory::GetForProfile(profile),
+      LoginUIServiceFactory::GetForProfile(profile)));
+  scoped_ptr<ExtensionDownloader> downloader =
+      CreateForRequestContext(profile->GetRequestContext(), delegate);
+  downloader->SetWebstoreIdentityProvider(identity_provider.Pass());
+  return downloader.Pass();
+}