media: Reject pending CDM promise during destruction.

content/browser/media/cdm/browser_cdm_manager.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 "content/browser/media/cdm/browser_cdm_manager.h"
 
 #include <stddef.h>
 #include <string>
 #include <utility>
 
@@ skipping 54 matching lines @@
                      int render_frame_id,
                      int cdm_id,
                      uint32_t promise_id)
       : manager_(manager),
         render_frame_id_(render_frame_id),
         cdm_id_(cdm_id),
         promise_id_(promise_id) {
     DCHECK(manager_);
   }
 
-  ~CdmPromiseInternal() final {}
+  ~CdmPromiseInternal() final {
+    if (!IsPromiseSettled())
+      RejectPromiseOnDestruction();
+  }
 
   // CdmPromiseTemplate<> implementation.
   void resolve(const T&... result) final;
 
   void reject(MediaKeys::Exception exception,
               uint32_t system_code,
               const std::string& error_message) final {
     MarkPromiseSettled();
     if (manager_) {
       manager_->RejectPromise(render_frame_id_, cdm_id_, promise_id_, exception,
                               system_code, error_message);
     }
   }
 
  private:
+  using media::CdmPromiseTemplate<T...>::IsPromiseSettled;
   using media::CdmPromiseTemplate<T...>::MarkPromiseSettled;
+  using media::CdmPromiseTemplate<T...>::RejectPromiseOnDestruction;
 
   base::WeakPtr<BrowserCdmManager> const manager_;
   const int render_frame_id_;
   const int cdm_id_;
   const uint32_t promise_id_;
 };
 
 template <>
 void CdmPromiseInternal<>::resolve() {
   MarkPromiseSettled();
@@ skipping 620 matching lines @@
   scoped_refptr<MediaKeys> cdm = GetCdm(render_frame_id, cdm_id);
   if (!cdm) {
     promise->reject(MediaKeys::INVALID_STATE_ERROR, 0, "CDM not found.");
     return;
   }
 
   cdm->LoadSession(session_type, session_id, std::move(promise));
 }
 
 }  // namespace content