Force glyph overflow calculation

Source/platform/fonts/WidthCache.h

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WidthCache_h
 #define WidthCache_h
 
-#include "platform/geometry/IntRectOutsets.h"
+#include "platform/geometry/FloatRectOutsets.h"
 #include "platform/text/TextRun.h"
 #include "wtf/Forward.h"
 #include "wtf/HashFunctions.h"
 #include "wtf/HashSet.h"
 #include "wtf/HashTableDeletedValueType.h"
 #include "wtf/StringHasher.h"
 
 namespace blink {
 
 struct WidthCacheEntry {
     WidthCacheEntry()
     {
         width = std::numeric_limits<float>::quiet_NaN();
     }
     bool isValid() const { return !std::isnan(width); }
     float width;
-    IntRectOutsets glyphBounds;
+    FloatRectOutsets glyphBounds;
 };
 
 class WidthCache {
 private:
     // Used to optimize small strings as hash table keys. Avoids malloc'ing an out-of-line StringImpl.
     class SmallStringKey {
     public:
         static unsigned capacity() { return s_capacity; }
 
         SmallStringKey()
@@ skipping 146 matching lines @@
 inline bool operator==(const WidthCache::SmallStringKey& a, const WidthCache::SmallStringKey& b)
 {
     if (a.length() != b.length())
         return false;
     return WTF::equal(a.characters(), b.characters(), a.length());
 }
 
 } // namespace blink
 
 #endif // WidthCache_h