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

media/base/mock_filters.cc

Index: media/base/mock_filters.cc
diff --git a/media/base/mock_filters.cc b/media/base/mock_filters.cc
index 249e531424ed4ce35bd3e0165ed19d782690f1bc..d32501e44ac79bf141f79869c97809f1f719b6e5 100644
--- a/media/base/mock_filters.cc
+++ b/media/base/mock_filters.cc
@@ -73,9 +73,10 @@ void MockDecryptorClient::KeyMessage(const std::string& key_system,
 
 void MockDecryptorClient::NeedKey(const std::string& key_system,
                                   const std::string& session_id,
+                                  const std::string& type,
                                   scoped_array<uint8> init_data,
                                   int init_data_length) {
-  NeedKeyMock(key_system, session_id, init_data.get(), init_data_length);
+  NeedKeyMock(key_system, session_id, type, init_data.get(), init_data_length);
 }
 
 MockFilterCollection::MockFilterCollection()