DevTools: Rename WebInspector.DOMAgent into WebInspector.DOMModel

LayoutTests/inspector/elements/elements-css-path.html

Index: LayoutTests/inspector/elements/elements-css-path.html
diff --git a/LayoutTests/inspector/elements/elements-css-path.html b/LayoutTests/inspector/elements/elements-css-path.html
index f6d17f8ecb9ccfad8054393d2922916edfc253c0..0dda25dabbb9f50ccff2290681f1679f15c00839 100644
--- a/LayoutTests/inspector/elements/elements-css-path.html
+++ b/LayoutTests/inspector/elements/elements-css-path.html
@@ -43,7 +43,7 @@ function test()
 
     function getDocumentElement()
     {
-        var map = WebInspector.domAgent._idToDOMNode;
+        var map = WebInspector.domModel._idToDOMNode;
         for (var id in map) {
             if (map[id].nodeName() === "#document")
                 return map[id];