media: Reject pending CDM promise during destruction.

third_party/WebKit/Source/platform/exported/WebContentDecryptionModuleResult.cpp

 // 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 "public/platform/WebContentDecryptionModuleResult.h"
 
 #include "platform/ContentDecryptionModuleResult.h"
 
 namespace blink {
 
+bool WebContentDecryptionModuleResult::isCompleted()
+{
+    return m_impl.get();
+}
+
 void WebContentDecryptionModuleResult::complete()
 {
     m_impl->complete();
     reset();
 }
 
 void WebContentDecryptionModuleResult::completeWithContentDecryptionModule(WebContentDecryptionModule* cdm)
 {
     m_impl->completeWithContentDecryptionModule(cdm);
     reset();
@@ skipping 18 matching lines @@
 }
 
 void WebContentDecryptionModuleResult::reset()
 {
     m_impl.reset();
 }
 
 void WebContentDecryptionModuleResult::assign(const WebContentDecryptionModuleResult& o)
 {
     m_impl = o.m_impl;
+    ASSERT(m_impl.get());
 }
 
 } // namespace blink