Invalidate line break selection rects when selected.

Source/core/layout/LayoutBR.cpp

Index: Source/core/layout/LayoutBR.cpp
diff --git a/Source/core/layout/LayoutBR.cpp b/Source/core/layout/LayoutBR.cpp
index 7ddd1277d1311dfba5bf9c31b24f1d073132a336..d58513bd7a4ba9dcc15695cc820bee37ef47323a 100644
--- a/Source/core/layout/LayoutBR.cpp
+++ b/Source/core/layout/LayoutBR.cpp
@@ -44,6 +44,16 @@ LayoutBR::~LayoutBR()
 {
 }
 
+LayoutRect LayoutBR::selectionRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const
+{
+    if (!RuntimeEnabledFeatures::selectionPaintingWithoutSelectionGapsEnabled())
+        return LayoutRect();
+
+    // Although line breaks contain no actual text, if we're selected we need
+    // to return a rect that includes space to illustrate a newline.
+    return LayoutText::selectionRectForPaintInvalidation(paintInvalidationContainer);
+}
+
 int LayoutBR::lineHeight(bool firstLine) const
 {
     const ComputedStyle& style = styleRef(firstLine && document().styleEngine().usesFirstLineRules());