Disable Math and Symbols segmentation, fix dotted circle sequence

third_party/WebKit/Source/platform/fonts/FontFallbackPriority.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef FontFallbackPriority_h
 #define FontFallbackPriority_h
 
 namespace blink {
 
 // http://unicode.org/reports/tr51/#Presentation_Style discusses the differences
 // between emoji in text and the emoji in emoji presentation. In that sense, the
 // EmojiEmoji wording is taken from there.  Also compare
 // http://unicode.org/Public/emoji/1.0/emoji-data.txt
 enum class FontFallbackPriority {
     // For regular non-symbols text,
     // normal text fallback in FontFallbackIterator
     Text,
-    // For non-emoji symbols
-    Symbols,
-    // For math & technical symbols
-    Math,
     // For emoji in text presentaiton
     EmojiText,
     // For emoji in emoji presentation
     EmojiEmoji,
     Invalid
 };
 
 bool isNonTextFallbackPriority(FontFallbackPriority);
 
 }; // namespace blink
 
 #endif