Switch line layout to LayoutUnit.

Source/core/layout/LayoutBlockFlow.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003-2013 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ skipping 311 matching lines @@
         NoFlowThread,
         MultiColumnFlowThread,
         PagedFlowThread
     };
 
     FlowThreadType flowThreadType(const ComputedStyle&);
 
     LayoutMultiColumnFlowThread* createMultiColumnFlowThread(FlowThreadType);
     void createOrDestroyMultiColumnFlowThreadIfNeeded(const ComputedStyle* oldStyle);
 
-    void updateLogicalWidthForAlignment(const ETextAlign&, const RootInlineBox*, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float& availableLogicalWidth, unsigned expansionOpportunityCount);
+    void updateLogicalWidthForAlignment(const ETextAlign&, const RootInlineBox*, BidiRun* trailingSpaceRun, LayoutUnit& logicalLeft, LayoutUnit& totalLogicalWidth, LayoutUnit& availableLogicalWidth, unsigned expansionOpportunityCount);
     void checkForPaginationLogicalHeightChange(LayoutUnit& pageLogicalHeight, bool& pageLogicalHeightChanged, bool& hasSpecifiedPageLogicalHeight);
     bool shouldRelayoutForPagination(LayoutUnit& pageLogicalHeight, LayoutUnit layoutOverflowLogicalBottom) const;
     void setColumnCountAndHeight(unsigned count, LayoutUnit pageLogicalHeight);
 
     bool shouldBreakAtLineToAvoidWidow() const { return m_rareData && m_rareData->m_lineBreakToAvoidWidow >= 0; }
     void clearShouldBreakAtLineToAvoidWidow() const;
     int lineBreakToAvoidWidow() const { return m_rareData ? m_rareData->m_lineBreakToAvoidWidow : -1; }
     void setBreakAtLineToAvoidWidow(int);
     void clearDidBreakAtLineToAvoidWidow();
     void setDidBreakAtLineToAvoidWidow();
@@ skipping 162 matching lines @@
 
 // FIXME-BLOCKFLOW: These methods have implementations in
 // LayoutBlockFlowLine. They should be moved to the proper header once the
 // line layout code is separated from LayoutBlock and LayoutBlockFlow.
 // START METHODS DEFINED IN LayoutBlockFlowLine
 private:
     InlineFlowBox* createLineBoxes(LayoutObject*, const LineInfo&, InlineBox* childBox);
     RootInlineBox* constructLine(BidiRunList<BidiRun>&, const LineInfo&);
     void setMarginsForRubyRun(BidiRun*, LayoutRubyRun*, LayoutObject*, const LineInfo&);
     void computeInlineDirectionPositionsForLine(RootInlineBox*, const LineInfo&, BidiRun* firstRun, BidiRun* trailingSpaceRun, bool reachedEnd, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&, WordMeasurements&);
-    BidiRun* computeInlineDirectionPositionsForSegment(RootInlineBox*, const LineInfo&, ETextAlign, float& logicalLeft,
-        float& availableLogicalWidth, BidiRun* firstRun, BidiRun* trailingSpaceRun, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache&, WordMeasurements&);
+    BidiRun* computeInlineDirectionPositionsForSegment(RootInlineBox*, const LineInfo&, ETextAlign, LayoutUnit& logicalLeft,
+        LayoutUnit& availableLogicalWidth, BidiRun* firstRun, BidiRun* trailingSpaceRun, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache&, WordMeasurements&);
     void computeBlockDirectionPositionsForLine(RootInlineBox*, BidiRun*, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&);
     void appendFloatingObjectToLastLine(FloatingObject*);
     // Helper function for layoutInlineChildren()
     RootInlineBox* createLineBoxesFromBidiRuns(unsigned bidiLevel, BidiRunList<BidiRun>&, const InlineIterator& end, LineInfo&, VerticalPositionCache&, BidiRun* trailingSpaceRun, WordMeasurements&);
     void layoutRunsAndFloats(LineLayoutState&);
     const InlineIterator& restartLayoutRunsAndFloatsInRange(LayoutUnit oldLogicalHeight, LayoutUnit newLogicalHeight,  FloatingObject* lastFloatFromPreviousLine, InlineBidiResolver&,  const InlineIterator&);
     void layoutRunsAndFloatsInRange(LineLayoutState&, InlineBidiResolver&,
         const InlineIterator& cleanLineStart, const BidiStatus& cleanLineBidiStatus);
     void linkToEndLineIfNeeded(LineLayoutState&);
     bool appendFloatsToEndOfLine(LineLayoutState&, bool updateFloatIndex);
@@ skipping 12 matching lines @@
 
 // END METHODS DEFINED IN LayoutBlockFlowLine
 
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutBlockFlow, isLayoutBlockFlow());
 
 } // namespace blink
 
 #endif // LayoutBlockFlow_h