[LayoutNG] Remove the ng_layout_coordinator and temporary LayoutSync method.

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

Index: third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h b/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
index ebe8f8cdfd8dcd20010462911c8f4e8c5f2f4f95..91022a0f4363799b7abe63971240c319237d2350 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
@@ -11,7 +11,7 @@
 namespace blink {
 
 class NGConstraintSpace;
-class NGFragment;
+class NGPhysicalFragment;
 class NGLayoutAlgorithm;
 
 // Represents the input to a layout algorithm for a given node. The layout
@@ -24,10 +24,8 @@ class CORE_EXPORT NGLayoutInputNode
 
   virtual ~NGLayoutInputNode(){};
 
-  // 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.
-  virtual bool Layout(NGConstraintSpace*, NGFragment**) = 0;
+  // Performs layout on this input node, will return a new fragment.
+  virtual NGPhysicalFragment* Layout(NGConstraintSpace*) = 0;
 
   // Returns the next sibling.
   virtual NGLayoutInputNode* NextSibling() = 0;