Add allocator interface for use by cdm_adapter

media/cdm/aes_decryptor_unittest.cc

Index: media/cdm/aes_decryptor_unittest.cc
diff --git a/media/cdm/aes_decryptor_unittest.cc b/media/cdm/aes_decryptor_unittest.cc
index 82338be6a6ab7e59575a5ef88db6e1f2006319d0..e9f3ea5ac0468b82654c9527cff0cfa00b01ba7f 100644
--- a/media/cdm/aes_decryptor_unittest.cc
+++ b/media/cdm/aes_decryptor_unittest.cc
@@ -22,6 +22,7 @@
 #include "media/cdm/aes_decryptor.h"
 #include "media/cdm/api/content_decryption_module.h"
 #include "media/cdm/cdm_adapter.h"
+#include "media/cdm/cdm_buffer_allocator_impl.h"
 #include "media/cdm/external_clear_key_test_helper.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest-param-test.h"
@@ -256,7 +257,8 @@ class AesDecryptorTest : public testing::TestWithParam<std::string> {
                      base::Unretained(this)),
           base::Bind(&AesDecryptorTest::OnSessionExpirationUpdate,
                      base::Unretained(this)),
-          base::Bind(&AesDecryptorTest::OnCdmCreated, base::Unretained(this)));
+          base::Bind(&AesDecryptorTest::OnCdmCreated, base::Unretained(this)),
+          new CdmBufferAllocatorImpl());
 
       message_loop_.RunUntilIdle();
     }