Use current selection when tab navigation.

third_party/WebKit/Source/core/editing/VisibleUnits.cpp

Index: third_party/WebKit/Source/core/editing/VisibleUnits.cpp
diff --git a/third_party/WebKit/Source/core/editing/VisibleUnits.cpp b/third_party/WebKit/Source/core/editing/VisibleUnits.cpp
index e9a3f6587ca79071a0f9fee72bcbc839bb075802..d9581dfe9ccafa1515a22fd2f92a319d8b7395f4 100644
--- a/third_party/WebKit/Source/core/editing/VisibleUnits.cpp
+++ b/third_party/WebKit/Source/core/editing/VisibleUnits.cpp
@@ -4119,10 +4119,11 @@ static void CollectAbsoluteBoundsForRange(unsigned start,
   layout_text.AbsoluteQuadsForRange(quads, start, end);
 }
 
-template <typename RectType>
-static Vector<RectType> ComputeTextBounds(const EphemeralRange& range) {
-  const Position& start_position = range.StartPosition();
-  const Position& end_position = range.EndPosition();
+template <typename RectType, typename Strategy>
+static Vector<RectType> ComputeTextBounds(
+    const EphemeralRangeTemplate<Strategy>& range) {
+  const PositionTemplate<Strategy>& start_position = range.StartPosition();
+  const PositionTemplate<Strategy>& end_position = range.EndPosition();
   Node* const start_container = start_position.ComputeContainerNode();
   DCHECK(start_container);
   Node* const end_container = end_position.ComputeContainerNode();
@@ -4145,14 +4146,24 @@ static Vector<RectType> ComputeTextBounds(const EphemeralRange& range) {
   return result;
 }
 
-IntRect ComputeTextRect(const EphemeralRange& range) {
+template <typename Strategy>
+static IntRect ComputeTextRectTemplate(
+    const EphemeralRangeTemplate<Strategy>& range) {
   IntRect result;
-  const Vector<IntRect>& rects = ComputeTextBounds<IntRect>(range);
+  const Vector<IntRect>& rects = ComputeTextBounds<IntRect, Strategy>(range);
   for (const IntRect& rect : rects)
     result.Unite(rect);
   return result;
 }
 
+IntRect ComputeTextRect(const EphemeralRange& range) {
+  return ComputeTextRectTemplate(range);
+}
+
+IntRect ComputeTextRect(const EphemeralRangeInFlatTree& range) {
+  return ComputeTextRectTemplate(range);
+}
+
 Vector<FloatQuad> ComputeTextQuads(const EphemeralRange& range) {
   return ComputeTextBounds<FloatQuad>(range);
 }