Remove CDM_7 support

media/cdm/supported_cdm_versions.cc

Index: media/cdm/supported_cdm_versions.cc
diff --git a/media/cdm/supported_cdm_versions.cc b/media/cdm/supported_cdm_versions.cc
index 4c007e3f302931327fe0b98567b9aabd01efef49..281ca7ebeccc07a9b35990ab28880498f43714b9 100644
--- a/media/cdm/supported_cdm_versions.cc
+++ b/media/cdm/supported_cdm_versions.cc
@@ -25,7 +25,6 @@ bool IsSupportedCdmInterfaceVersion(int version) {
   switch (version) {
     // Supported versions in decreasing order.
     case cdm::ContentDecryptionModule_8::kVersion:
-    case cdm::ContentDecryptionModule_7::kVersion:
       return true;
     default:
       return false;
@@ -39,7 +38,6 @@ bool IsSupportedCdmHostVersion(int version) {
   switch (version) {
     // Supported versions in decreasing order.
     case cdm::Host_8::kVersion:
-    case cdm::Host_7::kVersion:
       return true;
     default:
       return false;