media: Separate renewal from default External Clear Key test

chrome/renderer/media/chrome_key_systems.cc

Index: chrome/renderer/media/chrome_key_systems.cc
diff --git a/chrome/renderer/media/chrome_key_systems.cc b/chrome/renderer/media/chrome_key_systems.cc
index 8169331c87d5c137255f8de55af70c61ea5b565e..4c02dfef7c97eda34796c3a5912198881f8c843f 100644
--- a/chrome/renderer/media/chrome_key_systems.cc
+++ b/chrome/renderer/media/chrome_key_systems.cc
@@ -132,6 +132,8 @@ static void AddExternalClearKey(
       "org.chromium.externalclearkey";
   static const char kExternalClearKeyDecryptOnlyKeySystem[] =
       "org.chromium.externalclearkey.decryptonly";
+  static const char kExternalClearKeyRenewalKeySystem[] =
+      "org.chromium.externalclearkey.renewal";
   static const char kExternalClearKeyFileIOTestKeySystem[] =
       "org.chromium.externalclearkey.fileiotest";
   static const char kExternalClearKeyOutputProtectionTestKeySystem[] =
@@ -156,6 +158,10 @@ static void AddExternalClearKey(
   concrete_key_systems->emplace_back(
       new ExternalClearKeyProperties(kExternalClearKeyDecryptOnlyKeySystem));
 
+  // A key system that triggers renewal message in ClearKeyCdm.
+  concrete_key_systems->emplace_back(
+      new ExternalClearKeyProperties(kExternalClearKeyRenewalKeySystem));
+
   // A key system that triggers the FileIO test in ClearKeyCdm.
   concrete_key_systems->emplace_back(
       new ExternalClearKeyProperties(kExternalClearKeyFileIOTestKeySystem));