Remove Windows XP SHA-256 and ECDSA logic.

components/component_updater/configurator_impl.h

Index: components/component_updater/configurator_impl.h
diff --git a/components/component_updater/configurator_impl.h b/components/component_updater/configurator_impl.h
index b2e75a92f208c4d783bf52f4022a323067268742..959a9b193b78ea975a1e38fe18b24ae70fbae4d3 100644
--- a/components/component_updater/configurator_impl.h
+++ b/components/component_updater/configurator_impl.h
@@ -77,11 +77,6 @@ class ConfiguratorImpl {
   // non on-demand components.
   bool UseBackgroundDownloader() const;
 
-  // Setting this to false means that we'll only use secure transport (eg https)
-  // for update/ping urls. This is already false by default everywhere but older
-  // versions of Windows XP.
-  void set_enable_alt_source_url(bool enable_alt_source_url);
-
  private:
   net::URLRequestContextGetter* url_request_getter_;
   std::string extra_info_;
@@ -90,7 +85,6 @@ class ConfiguratorImpl {
   bool pings_enabled_;
   bool deltas_enabled_;
   bool background_downloads_enabled_;
-  bool fallback_to_alt_source_url_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(ConfiguratorImpl);
 };