Allow fallback from https to http for component update checks.

chrome/browser/component_updater/widevine_cdm_component_installer.cc

 // Copyright (c) 2013 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/widevine_cdm_component_installer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 #include <string>
@@ skipping 218 matching lines @@
 }  // namespace
 
 class WidevineCdmComponentInstallerTraits : public ComponentInstallerTraits {
  public:
   WidevineCdmComponentInstallerTraits();
   ~WidevineCdmComponentInstallerTraits() override {}
 
  private:
   // The following methods override ComponentInstallerTraits.
   bool CanAutoUpdate() const override;
+  bool RequiresNetworkEncryption() const override;
   bool OnCustomInstall(const base::DictionaryValue& manifest,
                                const base::FilePath& install_dir) override;
   bool VerifyInstallation(
       const base::DictionaryValue& manifest,
       const base::FilePath& install_dir) const override;
   void ComponentReady(
       const base::Version& version,
       const base::FilePath& path,
       scoped_ptr<base::DictionaryValue> manifest) override;
   base::FilePath GetBaseDirectory() const override;
@@ skipping 12 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(WidevineCdmComponentInstallerTraits);
 };
 
 WidevineCdmComponentInstallerTraits::WidevineCdmComponentInstallerTraits() {
 }
 
 bool WidevineCdmComponentInstallerTraits::CanAutoUpdate() const {
   return true;
 }
 
+bool WidevineCdmComponentInstallerTraits::RequiresNetworkEncryption() const {
+  return false;
+}
+
 bool WidevineCdmComponentInstallerTraits::OnCustomInstall(
     const base::DictionaryValue& manifest,
     const base::FilePath& install_dir) {
   return true;
 }
 
 // Once the CDM is ready, check the CDM adapter.
 void WidevineCdmComponentInstallerTraits::ComponentReady(
     const base::Version& version,
     const base::FilePath& path,
@@ skipping 92 matching lines @@
   scoped_ptr<ComponentInstallerTraits> traits(
       new WidevineCdmComponentInstallerTraits);
   // |cus| will take ownership of |installer| during installer->Register(cus).
   DefaultComponentInstaller* installer =
       new DefaultComponentInstaller(std::move(traits));
   installer->Register(cus, base::Closure());
 #endif  // defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_IS_COMPONENT)
 }
 
 }  // namespace component_updater