Even more explicit LayoutUnit conversion

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

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 1100 matching lines @@
     // WebCore inserts <div><br></div> *before* the current block, which correctly moves the paragraph down but which doesn't
     // change the caret's DOM position (["hello", 0]). In these situations the above FrameSelection::setSelection call
     // does not call EditorClient::respondToChangedSelection(), which, on the Mac, sends selection change notifications and
     // starts a new kill ring sequence, but we want to do these things (matches AppKit).
     if (selectionDidNotChangeDOMPosition)
         client().respondToChangedSelection(m_frame, frame().selection().selectionType());
 }
 
 IntRect Editor::firstRectForRange(const EphemeralRange& range) const
 {
-    LayoutUnit extraWidthToEndOfLine = 0;
+    LayoutUnit extraWidthToEndOfLine;
     ASSERT(range.isNotNull());
 
     IntRect startCaretRect = RenderedPosition(createVisiblePosition(range.startPosition()).deepEquivalent(), TextAffinity::Downstream).absoluteRect(&extraWidthToEndOfLine);
     if (startCaretRect.isEmpty())
         return IntRect();
 
     IntRect endCaretRect = RenderedPosition(createVisiblePosition(range.endPosition()).deepEquivalent(), TextAffinity::Upstream).absoluteRect();
     if (endCaretRect.isEmpty())
         return IntRect();
 
@@ skipping 248 matching lines @@
 }
 
 DEFINE_TRACE(Editor)
 {
     visitor->trace(m_frame);
     visitor->trace(m_lastEditCommand);
     visitor->trace(m_mark);
 }
 
 } // namespace blink