Remove outdated FIXME

Source/core/inspector/InspectorTraceEvents.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef InspectorTraceEvents_h
 #define InspectorTraceEvents_h
 
 #include "core/CoreExport.h"
 #include "core/css/CSSSelector.h"
 #include "platform/EventTracer.h"
@@ skipping 144 matching lines @@
 // not depend on this value.
 typedef const char LayoutInvalidationReasonForTracing[];
 
 class CORE_EXPORT InspectorLayoutInvalidationTrackingEvent {
 public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(const LayoutObject*, LayoutInvalidationReasonForTracing);
 };
 
 class InspectorPaintInvalidationTrackingEvent {
 public:
-    static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(const LayoutObject*, const LayoutObject* paintContainer);
+    static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(const LayoutObject*, const LayoutObject& paintContainer);
 };
 
 class InspectorScrollInvalidationTrackingEvent {
 public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(const LayoutObject&);
 };
 
 class InspectorSendRequestEvent {
 public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(unsigned long identifier, LocalFrame*, const ResourceRequest&);
@@ skipping 165 matching lines @@
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(const Animation&);
 };
 
 CORE_EXPORT String toHexString(const void* p);
 CORE_EXPORT void setCallStack(TracedValue*);
 
 } // namespace blink
 
 
 #endif // !defined(InspectorTraceEvents_h)