Convert unnecessary ContextLifecycleObservers into ContextClients.

third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp

Index: third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp
index 22cc3dbbf01b8d483f6f55781a2c2ec4f6e8191b..f9ce3ff1e17d25ebedafdbfd8509acb88fad5db4 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp
@@ -108,7 +108,7 @@ IDBTransaction::IDBTransaction(ExecutionContext* executionContext,
                                int64_t id,
                                const HashSet<String>& scope,
                                IDBDatabase* db)
-    : ContextLifecycleObserver(executionContext),
+    : ContextClient(executionContext),
       m_id(id),
       m_database(db),
       m_mode(WebIDBTransactionModeReadOnly),
@@ -125,7 +125,7 @@ IDBTransaction::IDBTransaction(ScriptState* scriptState,
                                const HashSet<String>& scope,
                                WebIDBTransactionMode mode,
                                IDBDatabase* db)
-    : ContextLifecycleObserver(scriptState->getExecutionContext()),
+    : ContextClient(scriptState->getExecutionContext()),
       m_id(id),
       m_database(db),
       m_mode(mode),
@@ -149,7 +149,7 @@ IDBTransaction::IDBTransaction(ExecutionContext* executionContext,
                                IDBDatabase* db,
                                IDBOpenDBRequest* openDBRequest,
                                const IDBDatabaseMetadata& oldMetadata)
-    : ContextLifecycleObserver(executionContext),
+    : ContextClient(executionContext),
       m_id(id),
       m_database(db),
       m_openDBRequest(openDBRequest),
@@ -177,7 +177,7 @@ DEFINE_TRACE(IDBTransaction) {
   visitor->trace(m_oldStoreMetadata);
   visitor->trace(m_deletedIndexes);
   EventTargetWithInlineData::trace(visitor);
-  ContextLifecycleObserver::trace(visitor);
+  ContextClient::trace(visitor);
 }
 
 void IDBTransaction::setError(DOMException* error) {
@@ -479,7 +479,7 @@ const AtomicString& IDBTransaction::interfaceName() const {
 }
 
 ExecutionContext* IDBTransaction::getExecutionContext() const {
-  return ContextLifecycleObserver::getExecutionContext();
+  return ContextClient::getExecutionContext();
 }
 
 DispatchEventResult IDBTransaction::dispatchEventInternal(Event* event) {