Make scoped enums output streamable.

ui/touch_selection/touch_handle.cc

Index: ui/touch_selection/touch_handle.cc
diff --git a/ui/touch_selection/touch_handle.cc b/ui/touch_selection/touch_handle.cc
index ad81711ac6b20572cf153cf085ee61d529ef593f..36cd7e2e55630714cded784b9b3d053725d716bd 100644
--- a/ui/touch_selection/touch_handle.cc
+++ b/ui/touch_selection/touch_handle.cc
@@ -45,23 +45,6 @@ bool RectIntersectsCircle(const gfx::RectF& rect,
 
 }  // namespace
 
-// TODO(AviD): Remove this once logging(DCHECK) supports enum class.
-static std::ostream& operator<<(std::ostream& os,
-                                const TouchHandleOrientation& orientation) {
-  switch (orientation) {
-    case TouchHandleOrientation::LEFT:
-      return os << "LEFT";
-    case TouchHandleOrientation::RIGHT:
-      return os << "RIGHT";
-    case TouchHandleOrientation::CENTER:
-      return os << "CENTER";
-    case TouchHandleOrientation::UNDEFINED:
-      return os << "UNDEFINED";
-    default:
-      return os << "INVALID: " << static_cast<int>(orientation);
-  }
-}
-
 // Responsible for rendering a selection or insertion handle for text editing.
 TouchHandle::TouchHandle(TouchHandleClient* client,
                          TouchHandleOrientation orientation,