Remove ContextLifecycleObserver from SpeechSynthesisUtterance

third_party/WebKit/Source/modules/speech/SpeechSynthesisUtterance.h

Index: third_party/WebKit/Source/modules/speech/SpeechSynthesisUtterance.h
diff --git a/third_party/WebKit/Source/modules/speech/SpeechSynthesisUtterance.h b/third_party/WebKit/Source/modules/speech/SpeechSynthesisUtterance.h
index 39f4b232a018c90864ca08a821f45fcee57ddf99..bad1e60de231607de542717aa87811435dfb7350 100644
--- a/third_party/WebKit/Source/modules/speech/SpeechSynthesisUtterance.h
+++ b/third_party/WebKit/Source/modules/speech/SpeechSynthesisUtterance.h
@@ -26,7 +26,6 @@
 #ifndef SpeechSynthesisUtterance_h
 #define SpeechSynthesisUtterance_h
 
-#include "core/dom/ContextLifecycleObserver.h"
 #include "modules/EventTargetModules.h"
 #include "modules/speech/SpeechSynthesisVoice.h"
 #include "platform/heap/Handle.h"
@@ -36,8 +35,7 @@ namespace blink {
 
 class SpeechSynthesisUtterance final
     : public EventTargetWithInlineData,
-      public PlatformSpeechSynthesisUtteranceClient,
-      public ContextLifecycleObserver {
+      public PlatformSpeechSynthesisUtteranceClient {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(SpeechSynthesisUtterance);
 
@@ -91,6 +89,7 @@ class SpeechSynthesisUtterance final
   // EventTarget
   const AtomicString& interfaceName() const override;
 
+  Member<ExecutionContext> m_executionContext;
   Member<PlatformSpeechSynthesisUtterance> m_platformUtterance;
   Member<SpeechSynthesisVoice> m_voice;
 };