Revert of Remove ContextLifecycleObserver from ScriptPromisePropertyBase

third_party/WebKit/Source/bindings/core/v8/ScriptPromiseProperty.h

Index: third_party/WebKit/Source/bindings/core/v8/ScriptPromiseProperty.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptPromiseProperty.h b/third_party/WebKit/Source/bindings/core/v8/ScriptPromiseProperty.h
index 02eaf3a096263ceef6c7bcd0af01a7f9e57ac647..00558812de31ef5da45d8b177a33940a45701da5 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptPromiseProperty.h
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptPromiseProperty.h
@@ -102,7 +102,7 @@
     ASSERT_NOT_REACHED();
     return;
   }
-  if (getExecutionContext()->isContextDestroyed())
+  if (!getExecutionContext() || getExecutionContext()->isContextDestroyed())
     return;
   m_resolved = value;
   resolveOrReject(Resolved);
@@ -116,7 +116,7 @@
     ASSERT_NOT_REACHED();
     return;
   }
-  if (getExecutionContext()->isContextDestroyed())
+  if (!getExecutionContext() || getExecutionContext()->isContextDestroyed())
     return;
   m_rejected = value;
   resolveOrReject(Rejected);