Remove CDM_7 support

media/cdm/supported_cdm_versions.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 "media/cdm/supported_cdm_versions.h"
 
 #include "media/cdm/api/content_decryption_module.h"
 
 namespace media {
 
 bool IsSupportedCdmModuleVersion(int version) {
   switch (version) {
     // Latest.
     case CDM_MODULE_VERSION:
       return true;
     default:
       return false;
   }
 }
 
 bool IsSupportedCdmInterfaceVersion(int version) {
   static_assert(cdm::ContentDecryptionModule::kVersion ==
                     cdm::ContentDecryptionModule_8::kVersion,
                 "update the code below");
   switch (version) {
     // Supported versions in decreasing order.
     case cdm::ContentDecryptionModule_8::kVersion:
-    case cdm::ContentDecryptionModule_7::kVersion:
       return true;
     default:
       return false;
   }
 }
 
 bool IsSupportedCdmHostVersion(int version) {
   static_assert(cdm::ContentDecryptionModule::Host::kVersion ==
                     cdm::ContentDecryptionModule_8::Host::kVersion,
                 "update the code below");
   switch (version) {
     // Supported versions in decreasing order.
     case cdm::Host_8::kVersion:
-    case cdm::Host_7::kVersion:
       return true;
     default:
       return false;
   }
 }
 
 }  // namespace media