Even more explicit LayoutUnit conversion

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

 /*
  * 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, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1140 matching lines @@
     }
 }
 
 LayoutUnit LayoutBlock::marginIntrinsicLogicalWidthForChild(LayoutBox& child) const
 {
     // A margin has three types: fixed, percentage, and auto (variable).
     // Auto and percentage margins become 0 when computing min/max width.
     // Fixed margins can be added in as is.
     Length marginLeft = child.style()->marginStartUsing(style());
     Length marginRight = child.style()->marginEndUsing(style());
-    LayoutUnit margin = 0;
+    LayoutUnit margin;
     if (marginLeft.isFixed())
         margin += marginLeft.value();
     if (marginRight.isFixed())
         margin += marginRight.value();
     return margin;
 }
 
 static bool needsLayoutDueToStaticPosition(LayoutBox* child)
 {
     // When a non-positioned block element moves, it may have positioned children that are
@@ skipping 376 matching lines @@
             box = box->containingBlock();
             ASSERT(box);
             if (!box)
                 break;
         }
     }
 }
 
 LayoutUnit LayoutBlock::textIndentOffset() const
 {
-    LayoutUnit cw = 0;
+    LayoutUnit cw;
     if (style()->textIndent().hasPercent())
         cw = containingBlock()->availableLogicalWidth();
     return minimumValueForLength(style()->textIndent(), cw);
 }
 
 void LayoutBlock::markLinesDirtyInBlockRange(LayoutUnit logicalTop, LayoutUnit logicalBottom, RootInlineBox* highest)
 {
     if (logicalTop >= logicalBottom)
         return;
 
@@ skipping 405 matching lines @@
     clearPreferredLogicalWidthsDirty();
 }
 
 void LayoutBlock::computeBlockPreferredLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
 {
     const ComputedStyle& styleToUse = styleRef();
     bool nowrap = styleToUse.whiteSpace() == NOWRAP;
 
     LayoutObject* child = firstChild();
     LayoutBlock* containingBlock = this->containingBlock();
-    LayoutUnit floatLeftWidth = 0, floatRightWidth = 0;
+    LayoutUnit floatLeftWidth, floatRightWidth;
     while (child) {
         // Positioned children don't affect the min/max width. Spanners only affect the min/max
         // width of the multicol container, not the flow thread.
         if (child->isOutOfFlowPositioned() || child->isColumnSpanAll()) {
             child = child->nextSibling();
             continue;
         }
 
         RefPtr<ComputedStyle> childStyle = child->mutableStyle();
         if (child->isFloating() || (child->isBox() && toLayoutBox(child)->avoidsFloats())) {
             LayoutUnit floatTotalWidth = floatLeftWidth + floatRightWidth;
             if (childStyle->clear() & CLEFT) {
                 maxLogicalWidth = std::max(floatTotalWidth, maxLogicalWidth);
                 floatLeftWidth = 0;
             }
             if (childStyle->clear() & CRIGHT) {
                 maxLogicalWidth = std::max(floatTotalWidth, maxLogicalWidth);
                 floatRightWidth = 0;
             }
         }
 
         // A margin basically has three types: fixed, percentage, and auto (variable).
         // Auto and percentage margins simply become 0 when computing min/max width.
         // Fixed margins can be added in as is.
         Length startMarginLength = childStyle->marginStartUsing(&styleToUse);
         Length endMarginLength = childStyle->marginEndUsing(&styleToUse);
-        LayoutUnit margin = 0;
-        LayoutUnit marginStart = 0;
-        LayoutUnit marginEnd = 0;
+        LayoutUnit margin;
+        LayoutUnit marginStart;
+        LayoutUnit marginEnd;
         if (startMarginLength.isFixed())
             marginStart += startMarginLength.value();
         if (endMarginLength.isFixed())
             marginEnd += endMarginLength.value();
         margin = marginStart + marginEnd;
 
         LayoutUnit childMinPreferredLogicalWidth, childMaxPreferredLogicalWidth;
         computeChildPreferredLogicalWidths(*child, childMinPreferredLogicalWidth, childMaxPreferredLogicalWidth);
 
         LayoutUnit w = childMinPreferredLogicalWidth + margin;
@@ skipping 834 matching lines @@
 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const LayoutObject* obj) const
 {
     showLayoutObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace blink