Use LayoutRect during addFocusRingRects to avoid loss of precision

Source/core/rendering/RenderBlock.cpp

Index: Source/core/rendering/RenderBlock.cpp
diff --git a/Source/core/rendering/RenderBlock.cpp b/Source/core/rendering/RenderBlock.cpp
index c600ee328d9aef57dc2b963d1bcc4a61b85e4bc2..c8d5b32f7dc21b0c668e16461ea665270278b0de 100644
--- a/Source/core/rendering/RenderBlock.cpp
+++ b/Source/core/rendering/RenderBlock.cpp
@@ -4435,7 +4435,7 @@ LayoutRect RenderBlock::localCaretRect(InlineBox* inlineBox, int caretOffset, La
     return caretRect;
 }
 
-void RenderBlock::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer) const
+void RenderBlock::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer) const
 {
     // For blocks inside inlines, we go ahead and include margins so that we run right up to the
     // inline boxes above and below us (thus getting merged with them to form a single irregular
@@ -4451,9 +4451,9 @@ void RenderBlock::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint& a
         LayoutUnit bottomMargin = nextInlineHasLineBox ? collapsedMarginAfter() : LayoutUnit();
         LayoutRect rect(additionalOffset.x(), additionalOffset.y() - topMargin, width(), height() + topMargin + bottomMargin);
         if (!rect.isEmpty())
-            rects.append(pixelSnappedIntRect(rect));
+            rects.append(rect);
     } else if (width() && height()) {
-        rects.append(pixelSnappedIntRect(additionalOffset, size()));
+        rects.append(LayoutRect(additionalOffset, size()));
     }
 
     if (!hasOverflowClip() && !hasControlClip()) {
@@ -4462,14 +4462,14 @@ void RenderBlock::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint& a
             LayoutUnit bottom = std::min<LayoutUnit>(curr->lineBottom(), curr->top() + curr->height());
             LayoutRect rect(additionalOffset.x() + curr->x(), additionalOffset.y() + top, curr->width(), bottom - top);
             if (!rect.isEmpty())
-                rects.append(pixelSnappedIntRect(rect));
+                rects.append(rect);
         }
 
         addChildFocusRingRects(rects, additionalOffset, paintContainer);
     }
 
     if (inlineElementContinuation())
-        inlineElementContinuation()->addFocusRingRects(rects, flooredLayoutPoint(additionalOffset + inlineElementContinuation()->containingBlock()->location() - location()), paintContainer);
+        inlineElementContinuation()->addFocusRingRects(rects, additionalOffset + (inlineElementContinuation()->containingBlock()->location() - location()), paintContainer);
 }
 
 void RenderBlock::computeSelfHitTestRects(Vector<LayoutRect>& rects, const LayoutPoint& layerOffset) const