Move CdmResultPromise to media/blink.

media/blink/cdm_result_promise.h

+// 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.
+
+#ifndef MEDIA_BLINK_CDM_RESULT_PROMISE_H_
+#define MEDIA_BLINK_CDM_RESULT_PROMISE_H_
+
+#include "base/basictypes.h"
+#include "media/base/cdm_promise.h"
+#include "media/base/media_keys.h"
+#include "media/blink/cdm_result_promise_helper.h"
+#include "third_party/WebKit/public/platform/WebContentDecryptionModuleResult.h"
+
+namespace media {
+
+// Used to convert a WebContentDecryptionModuleResult into a CdmPromiseTemplate
+// so that it can be passed through Chromium. When resolve(T) is called, the
+// appropriate complete...() method on WebContentDecryptionModuleResult will be
+// invoked. If reject() is called instead,
+// WebContentDecryptionModuleResult::completeWithError() is called.
+// If constructed with a |uma_name|, CdmResultPromise will report the promise
+// result (success or rejection code) to UMA.
+template <typename... T>
+class CdmResultPromise : public media::CdmPromiseTemplate<T...> {
+ public:
+  CdmResultPromise(const blink::WebContentDecryptionModuleResult& result,
+                   const std::string& uma_name);
+  virtual ~CdmResultPromise();
+
+  // CdmPromiseTemplate<T> implementation.
+  virtual void resolve(const T&... result) override;
+  virtual void reject(media::MediaKeys::Exception exception_code,
+                      uint32 system_code,
+                      const std::string& error_message) override;
+
+ private:
+  using media::CdmPromiseTemplate<T...>::MarkPromiseSettled;
+
+  blink::WebContentDecryptionModuleResult web_cdm_result_;
+
+  // UMA name to report result to.
+  std::string uma_name_;
+
+  DISALLOW_COPY_AND_ASSIGN(CdmResultPromise);
+};
+
+template <typename... T>
+CdmResultPromise<T...>::CdmResultPromise(
+    const blink::WebContentDecryptionModuleResult& result,
+    const std::string& uma_name)
+    : web_cdm_result_(result), uma_name_(uma_name) {
+}
+
+template <typename... T>
+CdmResultPromise<T...>::~CdmResultPromise() {
+}
+
+// "inline" is needed to prevent multiple definition error.
+
+template <>
+inline void CdmResultPromise<>::resolve() {
+  MarkPromiseSettled();
+  ReportCdmResultUMA(uma_name_, SUCCESS);
+  web_cdm_result_.complete();
+}
+
+template <>
+inline void CdmResultPromise<media::KeyIdsVector>::resolve(
+    const media::KeyIdsVector& result) {
+  // TODO(jrummell): Update blink::WebContentDecryptionModuleResult to
+  // handle the set of keys.
+  reject(media::MediaKeys::NOT_SUPPORTED_ERROR, 0, "Not implemented.");
+}
+
+template <typename... T>
+void CdmResultPromise<T...>::reject(media::MediaKeys::Exception exception_code,
+                                    uint32 system_code,
+                                    const std::string& error_message) {
+  MarkPromiseSettled();
+  ReportCdmResultUMA(uma_name_,
+                     ConvertCdmExceptionToResultForUMA(exception_code));
+  web_cdm_result_.completeWithError(ConvertCdmException(exception_code),
+                                    system_code,
+                                    blink::WebString::fromUTF8(error_message));
+}
+
+}  // namespace media
+
+#endif  // MEDIA_BLINK_CDM_RESULT_PROMISE_H_