Use uncanonicalized EndOfWordPosition() in visible selection end adjuster

This patch hoists the creation of VisiblePosition from EndOfWord
to its caller ComputeEndRespectingGranularityAlgorithm() to reduce
the usage VisiblePosition.

Bug: 657237
Change-Id: I29cc408d35ecc30db4aa635f5ad4bed88c0032c5
Reviewed-on: https://chromium-review.googlesource.com/c/1330789Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608026}

third_party/blink/renderer/core/editing/selection_adjuster.cc

@@ -186,7 +186,8 @@ class GranularityAdjuster final {
         const VisiblePositionTemplate<Strategy> original_end =
             CreateVisiblePosition(passed_end);
         const VisiblePositionTemplate<Strategy> word_end =
-            EndOfWord(original_end, ChooseWordSide(original_end));
+            CreateVisiblePosition(EndOfWordPosition(
+                passed_end.GetPosition(), ChooseWordSide(original_end)));
         if (!IsEndOfParagraph(original_end))
           return word_end.DeepEquivalent();
         if (IsEmptyTableCell(start.AnchorNode()))