Explore the possibility of implementing the CSS Region interface.

Source/core/inspector/InspectorCSSAgent.h

Index: Source/core/inspector/InspectorCSSAgent.h
diff --git a/Source/core/inspector/InspectorCSSAgent.h b/Source/core/inspector/InspectorCSSAgent.h
index ea13a40937c24cb1a6d465068b3d6a99ccdb6edd..6f52f514992ad4cdeca07a03479810aa5a6a9c47 100644
--- a/Source/core/inspector/InspectorCSSAgent.h
+++ b/Source/core/inspector/InspectorCSSAgent.h
@@ -56,6 +56,7 @@ class MediaList;
 class Node;
 class NodeList;
 class PlatformFontUsage;
+class RenderRegion;
 class StyleResolver;
 class UpdateRegionLayoutTask;
 
@@ -183,7 +184,7 @@ private:
     PassRefPtr<TypeBuilder::Array<TypeBuilder::CSS::CSSRule> > buildArrayForRuleList(CSSRuleList*, StyleResolver*);
     PassRefPtr<TypeBuilder::Array<TypeBuilder::CSS::RuleMatch> > buildArrayForMatchedRuleList(CSSRuleList*, StyleResolver*, Element*);
     PassRefPtr<TypeBuilder::CSS::CSSStyle> buildObjectForAttributesStyle(Element*);
-    PassRefPtr<TypeBuilder::Array<TypeBuilder::CSS::Region> > buildArrayForRegions(ErrorString*, PassRefPtr<NodeList>, int documentNodeId);
+    PassRefPtr<TypeBuilder::Array<TypeBuilder::CSS::Region> > buildArrayForRegions(ErrorString*, Vector<const RenderRegion*>, int documentNodeId);
     PassRefPtr<TypeBuilder::CSS::NamedFlow> buildObjectForNamedFlow(ErrorString*, NamedFlow*, int documentNodeId);
 
     // InspectorDOMAgent::DOMListener implementation