Fixed bugs with finding line boundaries using IA2 get_textAtOffset and AXPosition::AtStartOfLine.

ui/accessibility/ax_position.h

Index: ui/accessibility/ax_position.h
diff --git a/ui/accessibility/ax_position.h b/ui/accessibility/ax_position.h
index 0938f0509e23253cd7f2fc4a883948d82ece8236..8886b1f833d15763cb975a0481fd0b485fab2afa 100644
--- a/ui/accessibility/ax_position.h
+++ b/ui/accessibility/ax_position.h
@@ -276,8 +276,15 @@ class AXPosition {
         NOTREACHED();
         return false;
       case AXPositionKind::TEXT_POSITION:
-        return !text_position->IsInLineBreak() &&
-               GetPreviousOnLineID(text_position->anchor_id_) ==
+        // Special case, when the caret is right after a line break and the next
+        // position is not another line break. We should return |true| because
+        // visually the caret is at the beginning of a new line.
+        if (text_position->IsInLineBreak()) {
+          return text_position->AtEndOfAnchor() &&
+                 !text_position->CreateNextTextAnchorPosition()
+                      ->IsInLineBreak();
+        }
+        return GetPreviousOnLineID(text_position->anchor_id_) ==
                    INVALID_ANCHOR_ID &&
                text_position->AtStartOfAnchor();
     }