[LayoutNG] Introduce NGPhysicalFragment and make NGFragment a 'view'

third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h

Index: third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h b/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h
index 63559e8b756818de98dec7666702173c9017288c..8d825b4d487b2f4dfef4fdd045d477a86b927142 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h
@@ -15,7 +15,7 @@ namespace blink {
 
 class ComputedStyle;
 class NGConstraintSpace;
-class NGFragment;
+class NGPhysicalFragment;
 
 // A class for general block layout (e.g. a <div> with no special style).
 // Lays out the children in sequence.
@@ -35,7 +35,7 @@ class CORE_EXPORT NGBlockLayoutAlgorithm : public NGLayoutAlgorithm {
   // Returns true when done; when this function returns false, it has to be
   // called again. The out parameter will only be set when this function
   // returns true. The same constraint space has to be passed each time.
-  bool Layout(const NGConstraintSpace*, NGFragment**) override;
+  bool Layout(const NGConstraintSpace*, NGPhysicalFragment**) override;
 
   DEFINE_INLINE_VIRTUAL_TRACE() {
     NGLayoutAlgorithm::trace(visitor);