Update MediaKeys interface for EME

content/renderer/media/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 CONTENT_RENDERER_MEDIA_CDM_RESULT_PROMISE_H_
+#define CONTENT_RENDERER_MEDIA_CDM_RESULT_PROMISE_H_
+
+#include <map>
+
+#include "base/basictypes.h"
+#include "media/base/cdm_promise.h"
+#include "third_party/WebKit/public/platform/WebContentDecryptionModuleResult.h"
+
+namespace content {
+
+// Used to convert a WebContentDecryptionModuleResult into a CdmPromise so that
+// it can be passed through Chromium. When CdmPromise::resolve(T) is called,
+// OnResolve(T) will be called and will call the appropriate complete...()
+// method on WebContentDecryptionModuleResult. If CdmPromise::reject() is called
+// instead, WebContentDecryptionModuleResult::completeWithError() is called.
+// If constructed with a |uma_name| (which must be the name of a
+// CdmPromiseResult UMA), CdmResultPromise will report the promise result
+// (success or rejection code).
+template <typename T>
+class CdmResultPromise : public media::CdmPromiseTemplate<T> {
+ public:
+  explicit CdmResultPromise(
+      const blink::WebContentDecryptionModuleResult& result);
+  CdmResultPromise(const blink::WebContentDecryptionModuleResult& result,
+                   const std::string& uma_name);
+  virtual ~CdmResultPromise();
+
+ protected:
+  // OnResolve() is virtual as it may need special handling in derived classes.
+  virtual void OnResolve(const T& result);
+  void OnReject(media::MediaKeys::Exception exception_code,
+                uint32 system_code,
+                const std::string& error_message);
+
+  blink::WebContentDecryptionModuleResult web_cdm_result_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CdmResultPromise);
+};
+
+// Specialization for no parameter to resolve().
+template <>
+class CdmResultPromise<void> : public media::CdmPromiseTemplate<void> {
+ public:
+  explicit CdmResultPromise(
+      const blink::WebContentDecryptionModuleResult& result);
+  CdmResultPromise(const blink::WebContentDecryptionModuleResult& result,
+                   const std::string& uma_name);
+  virtual ~CdmResultPromise();
+
+ protected:
+  virtual void OnResolve();
+  void OnReject(media::MediaKeys::Exception exception_code,
+                uint32 system_code,
+                const std::string& error_message);
+
+  blink::WebContentDecryptionModuleResult web_cdm_result_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CdmResultPromise);
+};
+
+typedef CdmResultPromise<void> SimpleCdmResultPromise;
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_CDM_RESULT_PROMISE_H_