Prefer using ContextClient over ContextLifecycleObserver

third_party/WebKit/Source/modules/filesystem/DOMFileSystem.cpp

Index: third_party/WebKit/Source/modules/filesystem/DOMFileSystem.cpp
diff --git a/third_party/WebKit/Source/modules/filesystem/DOMFileSystem.cpp b/third_party/WebKit/Source/modules/filesystem/DOMFileSystem.cpp
index 619f3c801317714b8dd2909811cfdfc35c28e272..eec1bfcd23b99fe2776f5fb1f5239a521cc39391 100644
--- a/third_party/WebKit/Source/modules/filesystem/DOMFileSystem.cpp
+++ b/third_party/WebKit/Source/modules/filesystem/DOMFileSystem.cpp
@@ -92,7 +92,7 @@ DOMFileSystem::DOMFileSystem(ExecutionContext* context,
                              FileSystemType type,
                              const KURL& rootURL)
     : DOMFileSystemBase(context, name, type, rootURL),
-      ContextLifecycleObserver(context),
+      ContextClient(context),
       m_numberOfPendingCallbacks(0),
       m_rootEntry(DirectoryEntry::create(this, DOMFilePath::root)) {}
 
@@ -191,7 +191,7 @@ void DOMFileSystem::createFile(const FileEntry* fileEntry,
 
 DEFINE_TRACE(DOMFileSystem) {
   DOMFileSystemBase::trace(visitor);
-  ContextLifecycleObserver::trace(visitor);
+  ContextClient::trace(visitor);
   visitor->trace(m_rootEntry);
 }