Disambiguate LifecycleObserver::contextDestroyed

third_party/WebKit/Source/modules/mediastream/UserMediaRequest.cpp

Index: third_party/WebKit/Source/modules/mediastream/UserMediaRequest.cpp
diff --git a/third_party/WebKit/Source/modules/mediastream/UserMediaRequest.cpp b/third_party/WebKit/Source/modules/mediastream/UserMediaRequest.cpp
index d37407485d3e953ee0967866bb3806f7b5b024c4..ffdfeec3bab3a4a89db51f7a40b44e1031e32b7b 100644
--- a/third_party/WebKit/Source/modules/mediastream/UserMediaRequest.cpp
+++ b/third_party/WebKit/Source/modules/mediastream/UserMediaRequest.cpp
@@ -223,13 +223,11 @@ void UserMediaRequest::failUASpecific(const String& name,
       NavigatorUserMediaError::create(name, message, constraintName));
 }
 
-void UserMediaRequest::contextDestroyed() {
+void UserMediaRequest::contextDestroyed(ExecutionContext*) {
   if (m_controller) {
     m_controller->cancelUserMediaRequest(this);
     m_controller = nullptr;
   }
-
-  ContextLifecycleObserver::contextDestroyed();
 }
 
 DEFINE_TRACE(UserMediaRequest) {