input[type=number] should not accept numbers ending with '.'.

third_party/WebKit/Source/core/html/parser/HTMLParserIdioms.cpp

 /*
  * Copyright (C) 2010 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
@@ skipping 103 matching lines @@
     return value.isZero() ? Decimal(0) : value;
 }
 
 double parseToDoubleForNumberType(const String& string, double fallbackValue)
 {
     // http://www.whatwg.org/specs/web-apps/current-work/#floating-point-numbers
     // String::toDouble() accepts leading + and whitespace characters, which are not valid here.
     UChar firstCharacter = string[0];
     if (firstCharacter != '-' && firstCharacter != '.' && !isASCIIDigit(firstCharacter))
         return fallbackValue;
+    if (string.endsWith('.'))
+        return fallbackValue;
 
     bool valid = false;
     double value = string.toDouble(&valid);
     if (!valid)
         return fallbackValue;
 
     // NaN and infinity are considered valid by String::toDouble, but not valid here.
     if (!std::isfinite(value))
         return fallbackValue;
 
@@ skipping 275 matching lines @@
         string = StringImpl::create8BitIfPossible(characters, size);
     else if (width == Force8Bit)
         string = String::make8BitFrom16BitSource(characters, size);
     else
         string = String(characters, size);
 
     return string;
 }
 
 }