Cleaning codepoints/grapheme mess; it also helps with ICU API

Renamed all codepoints into utf16Index

Change-Id: Ie915395a56ac825637f6dbb25824cd1635a5b0a6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/296438
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
diff --git a/modules/skparagraph/tests/SkParagraphTest.cpp b/modules/skparagraph/tests/SkParagraphTest.cpp
index e72c8be..9a70087 100644
--- a/modules/skparagraph/tests/SkParagraphTest.cpp
+++ b/modules/skparagraph/tests/SkParagraphTest.cpp
@@ -2267,19 +2267,19 @@
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(301, 2.2f).position == 11);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(302, 2.6f).position == 11);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(301, 2.1f).position == 11);
-    REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(100000, 20).position == 18);//
+    REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(100000, 20).position == 18);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(450, 20).position == 16);
-    REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(100000, 90).position == 36);//
+    REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(100000, 90).position == 36);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(-100000, 90).position == 18);
     REPORTER_ASSERT(reporter,
                     paragraph->getGlyphPositionAtCoordinate(20, -80).position == 1);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(1, 90).position == 18);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(1, 170).position == 36);
-    REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(10000, 180).position == 72);//
+    REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(10000, 180).position == 72);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(70, 180).position == 56);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(1, 270).position == 72);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(35, 90).position == 19);
-    REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(10000, 10000).position == 77);//
+    REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(10000, 10000).position == 77);
     REPORTER_ASSERT(reporter, paragraph->getGlyphPositionAtCoordinate(85, 10000).position == 75);
 }