Allow fallback from https to http for component update checks.

chrome/browser/extensions/updater/chrome_update_client_config.cc

 // Copyright 2015 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 "base/command_line.h"
 #include "base/version.h"
 #include "chrome/browser/component_updater/component_patcher_operation_out_of_process.h"
 #include "chrome/browser/extensions/updater/chrome_update_client_config.h"
 #include "chrome/browser/update_client/chrome_update_query_params_delegate.h"
 #include "chrome/common/channel_info.h"
 #include "content/public/browser/browser_context.h"
 
 namespace extensions {
 
+// For privacy reasons, requires encryption of the component updater
+// communication with the update backend.
 ChromeUpdateClientConfig::ChromeUpdateClientConfig(
     content::BrowserContext* context)
     : impl_(base::CommandLine::ForCurrentProcess(),
-            context->GetRequestContext()) {
-}
+            context->GetRequestContext(),
+            true) {}

[asargent_no_longer_on_chrome, 2016/02/29 18:26:09]

please include a comment hinting at the meaning of this boolean, so that readers
don't have to go look it up, e.g.

true /* require_encryption */)

 
 int ChromeUpdateClientConfig::InitialDelay() const {
   return impl_.InitialDelay();
 }
 
 int ChromeUpdateClientConfig::NextCheckDelay() const {
   return impl_.NextCheckDelay();
 }
 
 int ChromeUpdateClientConfig::StepDelay() const {
@@ skipping 57 matching lines @@
   return impl_.UseBackgroundDownloader();
 }
 
 bool ChromeUpdateClientConfig::UseCupSigning() const {
   return impl_.UseCupSigning();
 }
 
 ChromeUpdateClientConfig::~ChromeUpdateClientConfig() {}
 
 }  // namespace extensions