Bug 1406080 - Part2 - Reject creating with unsupported cdm version in clearkey cdm and cdm-fake. r=cpearce

MozReview-Commit-ID: JvSsqZekRQ6

--HG--
extra : rebase_source : e80713dbf52aad29a32ff71a083c19479094b9a6

Author: JamesWCCheng

dom/media/fake-cdm/cdm-fake.cpp

@@ -52,6 +52,10 @@ void* CreateCdmInstance(int cdm_interface_version,
                         GetCdmHostFunc get_cdm_host_func,
                         void* user_data)
 {
+  if (cdm_interface_version != cdm::ContentDecryptionModule_8::kVersion) {
+    // Only support CDM version 8 currently.
+    return nullptr;
+  }
   cdm::Host_8* host = static_cast<cdm::Host_8*>(
     get_cdm_host_func(cdm_interface_version, user_data));
   return new FakeDecryptor(host);

media/gmp-clearkey/0.1/gmp-clearkey.cpp

@@ -56,6 +56,11 @@ void* CreateCdmInstance(int cdm_interface_version,
 
   CK_LOGE("ClearKey CreateCDMInstance");
 
+  if (cdm_interface_version != cdm::ContentDecryptionModule_8::kVersion) {
+    CK_LOGE("ClearKey CreateCDMInstance failed due to requesting unsupported version %d.",
+            cdm_interface_version);
+    return nullptr;
+  }
 #ifdef ENABLE_WMF
   if (!wmf::EnsureLibs()) {
     CK_LOGE("Required libraries were not found");