Disallow hashless hex color quirk for non integer <number>

LayoutTests/fast/css/parsing-color-quirk.html

 <script src="../../resources/testharness.js"></script>
 <script src="../../resources/testharnessreport.js"></script>
 <style>
 #t1 { color: 008000 }
 #t2 { background-color: 008000 }
 #t3 { border-color: 008000  }
 #t4 { border-bottom-color: 008000  }
 #t5 { border-left-color: 008000  }
 #t6 { border-right-color: 008000  }
 #t7 { border-top-color: 008000  }
@@ skipping 18 matching lines @@
 #t21 { stroke: ff0000 }
 #t22 { stop-color: ff0000 }
 #t23 { flood-color: ff0000 }
 #t24 { lighting-color: ff0000 }
 
 #t25 { border-top: ff0000 }
 #t26 { border-left: ff0000 }
 #t27 { border-right: ff0000 }
 #t28 { border-bottom: ff0000 }
 #t29 { border: ff0000 }
+
+#t30 { background-color: 1.1 }
+#t31 { background-color: +1.1 }
+#t32 { background-color: 1e1 }
+#t33 { background-color: 1e+1 }
+#t34 { background-color: 1e-1 }
 </style>
 <script>
 var sheet = document.styleSheets[0];
 
 test(function(){ assert_true(!!sheet); }, "StyleSheet present");
-test(function(){ assert_equals(sheet.cssRules.length, 29); }, "All rules parsed");
+test(function(){ assert_equals(sheet.cssRules.length, 34); }, "All rules parsed");
 
 test(function(){
     assert_equals(sheet.cssRules[0].style.color, "rgb(0, 128, 0)");
 }, "Hashless color quirk for color property");
 
 test(function(){
     assert_equals(sheet.cssRules[1].style.backgroundColor, "rgb(0, 128, 0)");
 }, "Hashless color quirk for background-color property");
 
 test(function(){
@@ skipping 96 matching lines @@
     assert_equals(sheet.cssRules[26].style.borderRightColor, "");
 }, "No hashless color quirk for border-right shorthand");
 
 test(function(){
     assert_equals(sheet.cssRules[27].style.borderBottomColor, "");
 }, "No hashless color quirk for border-bottom shorthand");
 
 test(function(){
     assert_equals(sheet.cssRules[28].style.borderTopColor, "");
 }, "No hashless color quirk for border shorthand");
+
+test(function(){
+    assert_equals(sheet.cssRules[29].style.backgroundColor, "");
+}, "No hashless color quirk for background-color property with invalid hashless value");
+
+test(function(){
+    assert_equals(sheet.cssRules[30].style.backgroundColor, "");
+}, "No hashless color quirk for background-color property with invalid hashless value");
+
+test(function(){
+    assert_equals(sheet.cssRules[31].style.backgroundColor, "");
+}, "No hashless color quirk for background-color property with invalid hashless value");
+
+test(function(){
+    assert_equals(sheet.cssRules[32].style.backgroundColor, "");
+}, "No hashless color quirk for background-color property with invalid hashless value");
+
+test(function(){
+    assert_equals(sheet.cssRules[33].style.backgroundColor, "");
+}, "No hashless color quirk for background-color property with invalid hashless value");
+
 </script>