Keep track of multiple layout roots

Source/core/frame/LocalFrame.cpp

Index: Source/core/frame/LocalFrame.cpp
diff --git a/Source/core/frame/LocalFrame.cpp b/Source/core/frame/LocalFrame.cpp
index efa8c40b47e6976d713c068dc4dd96e86d694749..d86d5b9cc9459d18bea63f5f2fbc9645ba25d003 100644
--- a/Source/core/frame/LocalFrame.cpp
+++ b/Source/core/frame/LocalFrame.cpp
@@ -449,25 +449,6 @@ bool LocalFrame::inScope(TreeScope* scope) const
     return owner->treeScope() == scope;
 }
 
-void LocalFrame::countObjectsNeedingLayout(unsigned& needsLayoutObjects, unsigned& totalObjects, bool& isPartial)
-{
-    LayoutObject* root = view()->layoutRoot();
-    isPartial = true;
-    if (!root) {
-        isPartial = false;
-        root = contentRenderer();
-    }
-
-    needsLayoutObjects = 0;
-    totalObjects = 0;
-
-    for (LayoutObject* o = root; o; o = o->nextInPreOrder(root)) {
-        ++totalObjects;
-        if (o->needsLayout())
-            ++needsLayoutObjects;
-    }
-}
-
 String LocalFrame::layerTreeAsText(LayerTreeFlags flags) const
 {
     TextStream textStream;