Oilpan: fix build after r351269.

third_party/WebKit/Source/core/inspector/PromiseTracker.cpp

Index: third_party/WebKit/Source/core/inspector/PromiseTracker.cpp
diff --git a/third_party/WebKit/Source/core/inspector/PromiseTracker.cpp b/third_party/WebKit/Source/core/inspector/PromiseTracker.cpp
index eb7a4a04d75cde9739b684067d71d81edf434ddc..6a5532f2223e1535575a394c20805e99dfdb5b37 100644
--- a/third_party/WebKit/Source/core/inspector/PromiseTracker.cpp
+++ b/third_party/WebKit/Source/core/inspector/PromiseTracker.cpp
@@ -23,11 +23,7 @@ class PromiseTracker::PromiseWeakCallbackData final {
     WTF_MAKE_NONCOPYABLE(PromiseWeakCallbackData);
 public:
     PromiseWeakCallbackData(PromiseTracker* tracker, int id)
-#if ENABLE(OILPAN)
-        : m_tracker(tracker)
-#else
         : m_tracker(tracker->m_weakPtrFactory.createWeakPtr())
-#endif
         , m_id(id)
     {
     }
@@ -40,7 +36,7 @@ public:
         m_tracker->m_listener->didUpdatePromise(InspectorFrontend::Debugger::EventType::Gc, promiseDetails.release());
     }
 
-    WeakPtrWillBeWeakPersistent<PromiseTracker> m_tracker;
+    WeakPtr<PromiseTracker> m_tracker;
     int m_id;
 };
 
@@ -77,9 +73,7 @@ PromiseTracker::PromiseTracker(Listener* listener, v8::Isolate* isolate)
     , m_captureStacks(false)
     , m_listener(listener)
     , m_isolate(isolate)
-#if !ENABLE(OILPAN)
     , m_weakPtrFactory(this)
-#endif
     , m_idToPromise(isolate)
 {
     clear();
@@ -89,13 +83,6 @@ PromiseTracker::~PromiseTracker()
 {
 }
 
-DEFINE_TRACE(PromiseTracker)
-{
-#if ENABLE(OILPAN)
-    visitor->trace(m_listener);
-#endif
-}
-
 void PromiseTracker::setEnabled(bool enabled, bool captureStacks)
 {
     m_isEnabled = enabled;