Support subpixel layout for borders.

third_party/WebKit/Source/core/page/SpatialNavigation.cpp

Index: third_party/WebKit/Source/core/page/SpatialNavigation.cpp
diff --git a/third_party/WebKit/Source/core/page/SpatialNavigation.cpp b/third_party/WebKit/Source/core/page/SpatialNavigation.cpp
index 63f72a1aefa3ef9ffd818cff6519274e99cef8ed..2a80c6c132cd96e603596f1a4df14c3809e6ccec 100644
--- a/third_party/WebKit/Source/core/page/SpatialNavigation.cpp
+++ b/third_party/WebKit/Source/core/page/SpatialNavigation.cpp
@@ -419,12 +419,12 @@ LayoutRect nodeRectInAbsoluteCoordinates(Node* node, bool ignoreBorder) {
   if (ignoreBorder) {
     rect.move(node->layoutObject()->style()->borderLeftWidth(),
               node->layoutObject()->style()->borderTopWidth());
-    rect.setWidth(rect.width() -
-                  node->layoutObject()->style()->borderLeftWidth() -
-                  node->layoutObject()->style()->borderRightWidth());
-    rect.setHeight(rect.height() -
-                   node->layoutObject()->style()->borderTopWidth() -
-                   node->layoutObject()->style()->borderBottomWidth());
+    rect.setWidth(LayoutUnit(
+        rect.width() - node->layoutObject()->style()->borderLeftWidth() -
+        node->layoutObject()->style()->borderRightWidth()));
+    rect.setHeight(LayoutUnit(
+        rect.height() - node->layoutObject()->style()->borderTopWidth() -
+        node->layoutObject()->style()->borderBottomWidth()));
   }
   return rect;
 }