Force all LayoutUnit construction to be explicit

third_party/WebKit/Source/core/layout/LayoutVTTCue.cpp

 /*
  * Copyright (C) 2012 Victor Carbune (victor@rosedu.org)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 61 matching lines @@
         return nullptr;
     return toLayoutInline(m_cueBox.firstChild())->firstLineBox();
 }
 
 LayoutUnit SnapToLinesLayouter::computeInitialPositionAdjustment(LayoutUnit& step) const
 {
     ASSERT(std::isfinite(m_cueBox.snapToLinesPosition()));
 
     // 6. Let line be cue's computed line.
     // 7. Round line to an integer by adding 0.5 and then flooring it.
-    LayoutUnit linePosition = floorf(m_cueBox.snapToLinesPosition() + 0.5f);
+    LayoutUnit linePosition(floorf(m_cueBox.snapToLinesPosition() + 0.5f));
 
     WritingMode writingMode = m_cueBox.style()->writingMode();
     // 8. Vertical Growing Left: Add one to line then negate it.
     if (writingMode == RightToLeftWritingMode)
         linePosition = -(linePosition + 1);
 
     // 9. Let position be the result of multiplying step and line offset.
     LayoutUnit position = step * linePosition;
 
     // 10. Vertical Growing Left: Decrease position by the width of the
@@ skipping 201 matching lines @@
     }
 
     // http://dev.w3.org/html5/webvtt/#dfn-apply-webvtt-cue-settings - step 13.
     if (!std::isnan(m_snapToLinesPosition))
         SnapToLinesLayouter(*this, controlsRect).layout();
     else
         repositionCueSnapToLinesNotSet();
 }
 
 } // namespace blink