[LayoutNG] Misc fixes in ShapingLineBreaker

third_party/WebKit/Source/platform/fonts/shaping/ShapeResult.cpp

 /*
  * Copyright (c) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 BlackBerry Limited. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 165 matching lines @@
 ShapeResult::~ShapeResult() {}
 
 size_t ShapeResult::ByteSize() const {
   size_t self_byte_size = sizeof(this);
   for (unsigned i = 0; i < runs_.size(); ++i) {
     self_byte_size += runs_[i]->ByteSize();
   }
   return self_byte_size;
 }
 
+unsigned ShapeResult::CharacterStartIndex() const {
+  return !Rtl() ? runs_.front()->start_index_ : runs_.back()->start_index_;
+}
+
+unsigned ShapeResult::OffsetForPosition(float target_x,
+                                        OffsetOptions options) const {
+  if (options == kOutsideAsStartOrEnd && target_x <= 0)
+    return Rtl() ? num_characters_ : 0;
+  return OffsetForPosition(target_x, false);
+}
+
 unsigned ShapeResult::OffsetForPosition(float target_x,
                                         bool include_partial_glyphs) const {
   unsigned characters_so_far = 0;
   float current_x = 0;
 
   if (Rtl()) {
     characters_so_far = num_characters_;
     for (unsigned i = 0; i < runs_.size(); ++i) {
       if (!runs_[i])
         continue;
@@ skipping 275 matching lines @@
   result->width_ = run->width_;
   result->num_glyphs_ = count;
   DCHECK_EQ(result->num_glyphs_, count);  // no overflow
   result->has_vertical_offsets_ =
       font_data->PlatformData().IsVerticalAnyUpright();
   result->runs_.push_back(std::move(run));
   return result.Release();
 }
 
 }  // namespace blink