Revert of Prefer using ContextClient over ContextLifecycleObserver

third_party/WebKit/Source/modules/presentation/PresentationRequest.cpp

Index: third_party/WebKit/Source/modules/presentation/PresentationRequest.cpp
diff --git a/third_party/WebKit/Source/modules/presentation/PresentationRequest.cpp b/third_party/WebKit/Source/modules/presentation/PresentationRequest.cpp
index b846410eb5486a690dd33e426bf2cc23a1d54927..c68701cbf44a845811d8702ee62a0b465de3e79c 100644
--- a/third_party/WebKit/Source/modules/presentation/PresentationRequest.cpp
+++ b/third_party/WebKit/Source/modules/presentation/PresentationRequest.cpp
@@ -84,7 +84,7 @@
 }
 
 ExecutionContext* PresentationRequest::getExecutionContext() const {
-  return ContextClient::getExecutionContext();
+  return ContextLifecycleObserver::getExecutionContext();
 }
 
 void PresentationRequest::addedEventListener(
@@ -205,11 +205,11 @@
 DEFINE_TRACE(PresentationRequest) {
   visitor->trace(m_availabilityProperty);
   EventTargetWithInlineData::trace(visitor);
-  ContextClient::trace(visitor);
+  ContextLifecycleObserver::trace(visitor);
 }
 
 PresentationRequest::PresentationRequest(ExecutionContext* executionContext,
                                          const KURL& url)
-    : ContextClient(executionContext), m_url(url) {}
+    : ContextLifecycleObserver(executionContext), m_url(url) {}
 
 }  // namespace blink