Introduce Layout*::adjustVisualRectForRasterEffects and use it for SVG hairlines.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  *               (http://www.torchmobile.com/)
@@ skipping 1198 matching lines @@
   context.newBounds =
       paintInvalidationState.computePaintInvalidationRectInBacking();
   context.newLocation =
       paintInvalidationState.computePositionFromPaintInvalidationBacking();
 
   IntSize adjustment =
       scrollAdjustmentForPaintInvalidation(paintInvalidationContainer);
   context.newLocation.move(adjustment);
   context.newBounds.move(adjustment);
 
+  adjustVisualRectForRasterEffects(context.newBounds);
+
   setPreviousPaintInvalidationRect(context.newBounds);
   setPreviousPositionFromPaintInvalidationBacking(context.newLocation);
 
   if (!shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState() &&
       paintInvalidationState
           .forcedSubtreeInvalidationRectUpdateWithinContainerOnly()) {
     // We are done updating the paint invalidation rect. No other paint
     // invalidation work to do for this object.
     return PaintInvalidationNone;
   }
@@ skipping 2308 matching lines @@
     const blink::LayoutObject* root = object1;
     while (root->parent())
       root = root->parent();
     root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
   } else {
     WTFLogAlways("%s", "Cannot showLayoutTree. Root is (nil)");
   }
 }
 
 #endif