media: Reject pending CDM promise during destruction.

media/blink/new_session_cdm_result_promise.cc

 // 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/blink/new_session_cdm_result_promise.h"
 
 #include "base/logging.h"
 #include "media/blink/cdm_result_promise_helper.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 
@@ skipping 18 matching lines @@
 NewSessionCdmResultPromise::NewSessionCdmResultPromise(
     const blink::WebContentDecryptionModuleResult& result,
     const std::string& uma_name,
     const SessionInitializedCB& new_session_created_cb)
     : web_cdm_result_(result),
       uma_name_(uma_name),
       new_session_created_cb_(new_session_created_cb) {
 }
 
 NewSessionCdmResultPromise::~NewSessionCdmResultPromise() {
+  if (web_cdm_result_.isCompleted())
+    return;
+
+  std::string message =
+      "Unfulfilled promise rejected automatically during destruction.";
+  DVLOG(1) << message;
+  reject(MediaKeys::INVALID_STATE_ERROR, 0, message);
 }
 
 void NewSessionCdmResultPromise::resolve(const std::string& session_id) {
   // |new_session_created_cb_| uses a WeakPtr<> and may not do anything
   // if the session object has been destroyed.
   SessionInitStatus status = SessionInitStatus::UNKNOWN_STATUS;
   new_session_created_cb_.Run(session_id, &status);
 
   if (status == SessionInitStatus::UNKNOWN_STATUS) {
     reject(MediaKeys::INVALID_STATE_ERROR, 0,
@@ skipping 11 matching lines @@
                                         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