Allow fallback from https to http for component update checks.

chrome/browser/component_updater/supervised_user_whitelist_installer.cc

 // 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/component_updater/supervised_user_whitelist_installer.h"
 
 #include <stddef.h>
+#include <map>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/important_file_writer.h"
 #include "base/location.h"
 #include "base/macros.h"
@@ skipping 223 matching lines @@
       const std::string& name,
       const RawWhitelistReadyCallback& callback)
       : crx_id_(crx_id), name_(name), callback_(callback) {}
   ~SupervisedUserWhitelistComponentInstallerTraits() override {}
 
  private:
   // ComponentInstallerTraits overrides:
   bool VerifyInstallation(const base::DictionaryValue& manifest,
                           const base::FilePath& install_dir) const override;
   bool CanAutoUpdate() const override;
+  bool RequiresNetworkEncryption() const override;
   bool OnCustomInstall(const base::DictionaryValue& manifest,
                        const base::FilePath& install_dir) override;
   void ComponentReady(const base::Version& version,
                       const base::FilePath& install_dir,
                       scoped_ptr<base::DictionaryValue> manifest) override;
   base::FilePath GetBaseDirectory() const override;
   void GetHash(std::vector<uint8_t>* hash) const override;
   std::string GetName() const override;
 
   std::string crx_id_;
   std::string name_;
   RawWhitelistReadyCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(SupervisedUserWhitelistComponentInstallerTraits);
 };
 
 bool SupervisedUserWhitelistComponentInstallerTraits::VerifyInstallation(
     const base::DictionaryValue& manifest,
     const base::FilePath& install_dir) const {
   // Check whether the whitelist exists at the path specified by the manifest.
   // This does not check whether the whitelist is wellformed.
   return base::PathExists(GetRawWhitelistPath(manifest, install_dir));
 }
 
 bool SupervisedUserWhitelistComponentInstallerTraits::CanAutoUpdate() const {
   return true;
 }
 
+bool SupervisedUserWhitelistComponentInstallerTraits::
+    RequiresNetworkEncryption() const {
+  return true;
+}
+
 bool SupervisedUserWhitelistComponentInstallerTraits::OnCustomInstall(
     const base::DictionaryValue& manifest,
     const base::FilePath& install_dir) {
   // Delete the existing sanitized whitelist.
   return base::DeleteFile(GetSanitizedWhitelistPath(crx_id_), false);
 }
 
 void SupervisedUserWhitelistComponentInstallerTraits::ComponentReady(
     const base::Version& version,
     const base::FilePath& install_dir,
@@ skipping 329 matching lines @@
 
 // static
 void SupervisedUserWhitelistInstaller::TriggerComponentUpdate(
     OnDemandUpdater* updater,
     const std::string& crx_id) {
   const bool result = updater->OnDemandUpdate(crx_id);
   DCHECK(result);
 }
 
 }  // namespace component_updater