Add support for the object-position CSS property.

Source/core/rendering/RenderReplaced.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 296 matching lines @@
         // can only be fixed once subpixel precision is available for things like intrinsicWidth/Height - which include zoom!
         constrainedSize.setWidth(RenderBox::computeReplacedLogicalHeight() * intrinsicSize.width() / intrinsicSize.height());
         constrainedSize.setHeight(RenderBox::computeReplacedLogicalWidth() * intrinsicSize.height() / intrinsicSize.width());
     }
 }
 
 LayoutRect RenderReplaced::replacedContentRect(const LayoutSize* overriddenIntrinsicSize) const
 {
     LayoutRect contentRect = contentBoxRect();
     ObjectFit objectFit = style()->objectFit();
-    if (objectFit == ObjectFitFill)
+    if (objectFit == ObjectFitFill && style()->objectPosition() == RenderStyle::initialObjectPosition())
         return contentRect;
 
     LayoutSize intrinsicSize = overriddenIntrinsicSize ? *overriddenIntrinsicSize : this->intrinsicSize();
     if (!intrinsicSize.width() || !intrinsicSize.height())
         return contentRect;
 
     LayoutRect finalRect = contentRect;
     switch (objectFit) {
     case ObjectFitContain:
     case ObjectFitScaleDown:
     case ObjectFitCover:
         finalRect.setSize(finalRect.size().fitToAspectRatio(intrinsicSize, objectFit == ObjectFitCover ? AspectRatioFitGrow : AspectRatioFitShrink));
         if (objectFit != ObjectFitScaleDown || finalRect.width() <= intrinsicSize.width())
             break;
         // fall through
     case ObjectFitNone:
         finalRect.setSize(intrinsicSize);
         break;
     case ObjectFitFill:
+        break;
+    default:
         ASSERT_NOT_REACHED();
     }
 
-    // FIXME: This is where object-position should be taken into account, but since it's not
-    // implemented yet, assume the initial value of "50% 50%".
-    LayoutUnit xOffset = (contentRect.width() - finalRect.width()) / 2;
-    LayoutUnit yOffset = (contentRect.height() - finalRect.height()) / 2;
+    LayoutUnit xOffset = minimumValueForLength(style()->objectPosition().x(), contentRect.width() - finalRect.width(), view());
+    LayoutUnit yOffset = minimumValueForLength(style()->objectPosition().y(), contentRect.height() - finalRect.height(), view());
     finalRect.move(xOffset, yOffset);
 
     return finalRect;
 }
 
 void RenderReplaced::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const
 {
     // If there's an embeddedContentBox() of a remote, referenced document available, this code-path should never be used.
     ASSERT(!embeddedContentBox());
     isPercentageIntrinsicSize = false;
@@ skipping 255 matching lines @@
 
     if (style()) {
         if (v)
             r.inflate(style()->outlineSize());
     }
     computeRectForRepaint(repaintContainer, r);
     return r;
 }
 
 }