Add "type" in GenerateKeyRequest() and OnNeedKey().

webkit/plugins/ppapi/ppapi_plugin_instance.cc

Index: webkit/plugins/ppapi/ppapi_plugin_instance.cc
diff --git a/webkit/plugins/ppapi/ppapi_plugin_instance.cc b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
index 17ea71cc810e1280d1ea223fbbf7b08caf1cbf4a..fa095d0cb6d1088e341e2090461b88af1345a344 100644
--- a/webkit/plugins/ppapi/ppapi_plugin_instance.cc
+++ b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
@@ -1606,6 +1606,7 @@ void PluginInstance::set_decrypt_client(
 }
 
 bool PluginInstance::GenerateKeyRequest(const std::string& key_system,
+                                        const std::string& type,
                                         const std::string& init_data) {
   if (!LoadContentDecryptorInterface())
     return false;
@@ -1616,6 +1617,7 @@ bool PluginInstance::GenerateKeyRequest(const std::string& key_system,
       PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferPPVar(
           init_data.size(), init_data.data());
 
+  // TODO(tomfinegan): Pass "type" once PPP_ContentDecryptor_Private is updated.
   plugin_decryption_interface_->GenerateKeyRequest(
       pp_instance(),
       StringVar::StringToPPVar(key_system),