Let positionNewFloats() take a logicalTop parameter.

third_party/WebKit/Source/core/layout/api/LineLayoutBlockFlow.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LineLayoutBlockFlow_h
 #define LineLayoutBlockFlow_h
 
 #include "core/layout/FloatingObjects.h"
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/api/LineLayoutBox.h"
@@ skipping 100 matching lines @@
 
   FloatingObject* insertFloatingObject(LayoutBox& box) {
     return toBlockFlow()->insertFloatingObject(box);
   }
 
   FloatingObject* insertFloatingObject(LineLayoutBox box) {
     return toBlockFlow()->insertFloatingObject(
         *toLayoutBox(box.layoutObject()));
   }
 
-  bool positionNewFloats(LineWidth* width) {
-    return toBlockFlow()->positionNewFloats(width);
+  bool positionNewFloats(LayoutUnit logicalTop, LineWidth* width) {
+    return toBlockFlow()->positionNewFloats(logicalTop, width);
   }
 
   LayoutUnit nextFloatLogicalBottomBelow(LayoutUnit logicalHeight) const {
     return toBlockFlow()->nextFloatLogicalBottomBelow(logicalHeight);
   }
 
   FloatingObject* lastFloatFromPreviousLine() const {
     return toBlockFlow()->lastFloatFromPreviousLine();
   }
 
@@ skipping 65 matching lines @@
  private:
   LayoutBlockFlow* toBlockFlow() { return toLayoutBlockFlow(layoutObject()); };
   const LayoutBlockFlow* toBlockFlow() const {
     return toLayoutBlockFlow(layoutObject());
   };
 };
 
 }  // namespace blink
 
 #endif  // LineLayoutBlockFlow_h