Handle plugin instance crash in ContentDecryptorDelegate.

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 bb59fae87ffb61dd955b4b8dcd812d3d603539ad..5454c813bf58de41988eb7ce0c69109397d2806b 100644
--- a/chrome/renderer/media/chrome_key_systems.cc
+++ b/chrome/renderer/media/chrome_key_systems.cc
@@ -70,6 +70,8 @@ static void AddExternalClearKey(
       "org.chromium.externalclearkey.fileiotest";
   static const char kExternalClearKeyInitializeFailKeySystem[] =
       "org.chromium.externalclearkey.initializefail";
+  static const char kExternalClearKeyCrashKeySystem[] =
+      "org.chromium.externalclearkey.crash";
   static const char kExternalClearKeyPepperType[] =
       "application/x-ppapi-clearkey-cdm";
 
@@ -106,6 +108,10 @@ static void AddExternalClearKey(
   // failure case.
   info.key_system = kExternalClearKeyInitializeFailKeySystem;
   concrete_key_systems->push_back(info);
+
+  // A key system that triggers a crash in ClearKeyCdm.
+  info.key_system = kExternalClearKeyCrashKeySystem;
+  concrete_key_systems->push_back(info);
 }
 #endif  // defined(ENABLE_PEPPER_CDMS)