Add Mojo CDM Service.

media/mojo/services/mojo_cdm_promise.cc

Index: media/mojo/services/mojo_cdm_promise.cc
diff --git a/media/mojo/services/mojo_cdm_promise.cc b/media/mojo/services/mojo_cdm_promise.cc
new file mode 100644
index 0000000000000000000000000000000000000000..84d2328b73313c624a0885b4b71c03459e9a5eca
--- /dev/null
+++ b/media/mojo/services/mojo_cdm_promise.cc
@@ -0,0 +1,63 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "media/mojo/services/mojo_cdm_promise.h"
+
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "media/base/decryptor.h"
+#include "media/base/media_keys.h"
+
+namespace media {
+
+static mojo::CdmPromiseResultPtr GetRejectResult(
+    MediaKeys::Exception exception,
+    uint32_t system_code,
+    const std::string& error_message) {
+  mojo::CdmPromiseResultPtr cdm_promise_result(mojo::CdmPromiseResult::New());
+  cdm_promise_result->success = false;
+  cdm_promise_result->exception = static_cast<mojo::CdmException>(exception);
+  cdm_promise_result->system_code = system_code;
+  cdm_promise_result->error_message = error_message;
+  return cdm_promise_result.Pass();
+}
+
+template <typename... T>
+MojoCdmPromise<T...>::MojoCdmPromise(const CallbackType& callback)
+    : callback_(callback) {
+  DCHECK(!callback_.is_null());
+}
+
+template <typename... T>
+MojoCdmPromise<T...>::~MojoCdmPromise() {
+  if (!callback_.is_null())
+    DVLOG(1) << "Promise not resolved before destruction.";
+}
+
+template <typename... T>
+void MojoCdmPromise<T...>::resolve(const T&... result) {
+  mojo::CdmPromiseResultPtr cdm_promise_result(mojo::CdmPromiseResult::New());
+  cdm_promise_result->success = true;
+  callback_.Run(cdm_promise_result.Pass(),
+                MojoTypeTrait<T>::MojoType::From(result)...);
+  callback_.reset();
+}
+
+template <typename... T>
+void MojoCdmPromise<T...>::reject(MediaKeys::Exception exception,
+                                  uint32_t system_code,
+                                  const std::string& error_message) {
+  callback_.Run(GetRejectResult(exception, system_code, error_message),
+                MojoTypeTrait<T>::DefaultValue()...);
+  callback_.reset();
+}
+
+template class MojoCdmPromise<>;
+template class MojoCdmPromise<std::string>;
+template class MojoCdmPromise<std::vector<std::vector<uint8_t>>>;
+
+}  // namespace media