Unify and provide one IsGarbageCollectedType<T> implementation.

third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 29 matching lines @@
 #include "core/layout/LayoutAnalyzer.h"
 #include "core/layout/LayoutFlowThread.h"
 #include "core/layout/LayoutMultiColumnFlowThread.h"
 #include "core/layout/LayoutMultiColumnSpannerPlaceholder.h"
 #include "core/layout/LayoutPagedFlowThread.h"
 #include "core/layout/LayoutText.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/TextAutosizer.h"
 #include "core/layout/api/SelectionState.h"
 #include "core/layout/line/GlyphOverflow.h"
+#include "core/layout/line/InlineTextBox.h"
 #include "core/layout/line/LineBreaker.h"
 #include "core/layout/line/LineWidth.h"
 #include "core/layout/shapes/ShapeOutsideInfo.h"
 #include "core/paint/BlockFlowPainter.h"
 #include "core/paint/ClipScope.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
 #include "core/paint/PaintInfo.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/geometry/TransformState.h"
@@ skipping 3789 matching lines @@
             if (!rect.isEmpty())
                 rects.append(rect);
         }
     }
 
     if (inlineElementContinuation)
         inlineElementContinuation->addOutlineRects(rects, additionalOffset + (inlineElementContinuation->containingBlock()->location() - location()), includeBlockOverflows);
 }
 
 } // namespace blink