Disable Math and Symbols segmentation, fix dotted circle sequence

third_party/WebKit/Source/platform/fonts/ScriptRunIteratorTest.cpp

 // 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.
 
 #include "platform/fonts/ScriptRunIterator.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "wtf/Assertions.h"
 #include "wtf/Threading.h"
 #include "wtf/text/WTFString.h"
@@ skipping 345 matching lines @@
 TEST_F(ScriptRunIteratorTest, Whitespace)
 {
     CHECK_RUNS({ { " \t ", USCRIPT_COMMON } });
 }
 
 TEST_F(ScriptRunIteratorTest, Common)
 {
     CHECK_RUNS({ { " ... !?", USCRIPT_COMMON } });
 }
 
+TEST_F(ScriptRunIteratorTest, CombiningCircle)
+{
+    CHECK_RUNS({ { "◌́◌̀◌̈◌̂◌̄◌̊", USCRIPT_COMMON } });
+}
+
+
 TEST_F(ScriptRunIteratorTest, Latin)
 {
     CHECK_RUNS({ { "latin", USCRIPT_LATIN } });
 }
 
 TEST_F(ScriptRunIteratorTest, Chinese)
 {
     CHECK_RUNS({ { "萬國碼", USCRIPT_HAN } });
 }
 
@@ skipping 363 matching lines @@
         }
     }
 }
 
 // ZWJ is \u200D Cf (Format, other) and its script is inherited.  I'm going to
 // ignore this for now, as I think it shouldn't matter which run it ends up
 // in. HarfBuzz needs to be able to use it as context and shape each
 // neighboring character appropriately no matter what run it got assigned to.
 
 } // namespace blink