Even more explicit LayoutUnit conversion

third_party/WebKit/Source/core/editing/SelectionEditor.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * 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 675 matching lines @@
 
     if (userTriggered == UserTriggered) {
         OwnPtrWillBeRawPtr<FrameSelection> trialFrameSelection = FrameSelection::create();
         trialFrameSelection->setSelection(m_selection);
         trialFrameSelection->modify(alter, verticalDistance, direction, NotUserTriggered);
     }
 
     willBeModified(alter, direction == FrameSelection::DirectionUp ? DirectionBackward : DirectionForward);
 
     VisiblePosition pos;
-    LayoutUnit xPos = 0;
+    LayoutUnit xPos;
     switch (alter) {
     case FrameSelection::AlterationMove:
         pos = createVisiblePosition(direction == FrameSelection::DirectionUp ? m_selection.start() : m_selection.end(), m_selection.affinity());
         xPos = lineDirectionPointForBlockDirectionNavigation(direction == FrameSelection::DirectionUp ? START : END);
         m_selection.setAffinity(direction == FrameSelection::DirectionUp ? TextAffinity::Upstream : TextAffinity::Downstream);
         break;
     case FrameSelection::AlterationExtend:
         pos = createVisiblePosition(m_selection.extent(), m_selection.affinity());
         xPos = lineDirectionPointForBlockDirectionNavigation(EXTENT);
         m_selection.setAffinity(TextAffinity::Downstream);
@@ skipping 64 matching lines @@
     // relative to the text, not absolute 'up'.
     FloatPoint caretPoint = layoutObject->localToAbsolute(FloatPoint(localRect.location()));
     LayoutObject* containingBlock = layoutObject->containingBlock();
     if (!containingBlock)
         containingBlock = layoutObject; // Just use ourselves to determine the writing mode if we have no containing block.
     return containingBlock->isHorizontalWritingMode() ? caretPoint.x() : caretPoint.y();
 }
 
 LayoutUnit SelectionEditor::lineDirectionPointForBlockDirectionNavigation(EPositionType type)
 {
-    LayoutUnit x = 0;
+    LayoutUnit x;
 
     if (m_selection.isNone())
         return x;
 
     Position pos;
     switch (type) {
     case START:
         pos = m_selection.start();
         break;
     case END:
@@ skipping 94 matching lines @@
 DEFINE_TRACE(SelectionEditor)
 {
     visitor->trace(m_frameSelection);
     visitor->trace(m_selection);
     visitor->trace(m_selectionInComposedTree);
     visitor->trace(m_logicalRange);
     VisibleSelectionChangeObserver::trace(visitor);
 }
 
 } // namespace blink