Remove display:run-in as per https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/_tHSX…

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index 3d954cb794ed7849745b14f672c1601dfaa9d0a6..4d3dab7f8b2c946973bf55cc2dba9a8ccebf2e10 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -172,9 +172,7 @@ RenderObject* RenderObject::createObject(Element* element, RenderStyle* style)
     if (RuntimeEnabledFeatures::cssRegionsEnabled() && style->isDisplayRegionType() && style->hasFlowFrom() && doc.renderView())
         return new RenderRegion(element, 0);
 
-    if (style->display() == RUN_IN)
-        UseCounter::count(doc, UseCounter::CSSDisplayRunIn);
-    else if (style->display() == COMPACT)
+    if (style->display() == COMPACT)
         UseCounter::count(doc, UseCounter::CSSDisplayCompact);
 
     switch (style->display()) {
@@ -184,7 +182,6 @@ RenderObject* RenderObject::createObject(Element* element, RenderStyle* style)
         return new RenderInline(element);
     case BLOCK:
     case INLINE_BLOCK:
-    case RUN_IN:
     case COMPACT:
         if ((!style->hasAutoColumnCount() || !style->hasAutoColumnWidth()) && doc.regionBasedColumnsEnabled())
             return new RenderMultiColumnBlock(element);
@@ -3303,11 +3300,6 @@ bool RenderObject::canHaveGeneratedChildren() const
     return canHaveChildren();
 }
 
-bool RenderObject::canBeReplacedWithInlineRunIn() const
-{
-    return true;
-}
-
 void RenderObject::setNeedsBoundariesUpdate()
 {
     if (RenderObject* renderer = parent())