Better overflow handling for aspect-ratio MQ.

third_party/WebKit/Source/core/css/MediaQueryExp.cpp

 /*
  * CSS Media Query
  *
  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2013 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:
@@ skipping 266 matching lines @@
     if (delimiter.GetType() != kDelimiterToken || delimiter.Delimiter() != '/')
       return nullptr;
     if (numerator.GetType() != kNumberToken || numerator.NumericValue() <= 0 ||
         numerator.GetNumericValueType() != kIntegerValueType)
       return nullptr;
     if (denominator.GetType() != kNumberToken ||
         denominator.NumericValue() <= 0 ||
         denominator.GetNumericValueType() != kIntegerValueType)
       return nullptr;
 
-    exp_value.numerator = (unsigned)numerator.NumericValue();
-    exp_value.denominator = (unsigned)denominator.NumericValue();
+    exp_value.numerator = clampTo<unsigned>(numerator.NumericValue());
+    exp_value.denominator = clampTo<unsigned>(denominator.NumericValue());
     exp_value.is_ratio = true;
   } else {
     return nullptr;
   }
 
   return new MediaQueryExp(lower_media_feature, exp_value);
 }
 
 MediaQueryExp::~MediaQueryExp() {}
 
@@ skipping 31 matching lines @@
     output.Append('/');
     output.Append(PrintNumber(denominator));
   } else if (is_id) {
     output.Append(getValueName(id));
   }
 
   return output.ToString();
 }
 
 }  // namespace blink