Return EphemeralRange from Editor::findRangeOfString.

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

Index: third_party/WebKit/Source/core/editing/EphemeralRange.cpp
diff --git a/third_party/WebKit/Source/core/editing/EphemeralRange.cpp b/third_party/WebKit/Source/core/editing/EphemeralRange.cpp
index a578146ae9e2cb48ea7aad6e06331b761e872981..7cc6901290b29b8928672926562965432e4b7f12 100644
--- a/third_party/WebKit/Source/core/editing/EphemeralRange.cpp
+++ b/third_party/WebKit/Source/core/editing/EphemeralRange.cpp
@@ -9,6 +9,8 @@
 #include "core/dom/Element.h"
 #include "core/dom/Range.h"
 #include "core/dom/Text.h"
+#include "core/editing/EditingUtilities.h"
+#include "core/layout/LayoutText.h"
 
 namespace blink {
 
@@ -123,6 +125,29 @@ EphemeralRangeTemplate<Strategy> EphemeralRangeTemplate<Strategy>::rangeOfConten
     return EphemeralRangeTemplate<Strategy>(PositionTemplate<Strategy>::firstPositionInNode(&const_cast<Node&>(node)), PositionTemplate<Strategy>::lastPositionInNode(&const_cast<Node&>(node)));
 }
 
+static IntRect uniteRects(const Vector<IntRect>& rects)
+{
+    IntRect result;
+    for (const auto& rect : rects)
+        result.unite(rect);
+    return result;
+}
+
+template <typename Strategy>
+IntRect EphemeralRangeTemplate<Strategy>::textBoundingBox() const
+{
+    if (isCollapsed())
+        return IntRect();
+
+    Vector<IntRect> rects;
+    collectTextBoundsInRange(
+        m_startPosition, m_endPosition,
+        m_startPosition.nodeAsRangeFirstNode(), m_endPosition.nodeAsRangePastLastNode(),
+        rects);
+
+    return uniteRects(rects);
+}
+
 #if ENABLE(ASSERT)
 template <typename Strategy>
 bool EphemeralRangeTemplate<Strategy>::isValid() const