Reflected attributes should be removed when 'null', 'undefined' or 'false' is specified

LayoutTests/fast/html/marquee-element.html

Index: LayoutTests/fast/html/marquee-element.html
diff --git a/LayoutTests/fast/html/marquee-element.html b/LayoutTests/fast/html/marquee-element.html
index 4dca79b8be67975fb265fb98e502265f1d71939e..9109a742a2f5b9c24e5b97ca5457b8c41f29a3b8 100644
--- a/LayoutTests/fast/html/marquee-element.html
+++ b/LayoutTests/fast/html/marquee-element.html
@@ -19,7 +19,7 @@ shouldBe('marquee.behavior', '"slide"');
 debug('"behavior" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" behavior="slide">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.behavior="alternate";
+marquee.behavior = "alternate";
 shouldBe('marquee.behavior', '"alternate"');
 
 debug('"bgColor" IDL attribute reflects content attribute:');
@@ -30,7 +30,7 @@ shouldBe('marquee.bgColor', '"red"');
 debug('"bgColor" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" bgcolor="red">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.bgColor="blue";
+marquee.bgColor = "blue";
 shouldBe('marquee.bgColor', '"blue"');
 
 debug('"direction" IDL attribute reflects content attribute:');
@@ -41,7 +41,7 @@ shouldBe('marquee.direction', '"right"');
 debug('"direction" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" direction="right">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.direction="left";
+marquee.direction = "left";
 shouldBe('marquee.direction', '"left"');
 
 debug('"height" IDL attribute reflects content attribute:');
@@ -52,7 +52,7 @@ shouldBe('marquee.height', '"100px"');
 debug('"height" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" height="100px">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.height="200px";
+marquee.height = "200px";
 shouldBe('marquee.height', '"200px"');
 
 debug('"hspace" IDL attribute reflects content attribute:');
@@ -63,7 +63,7 @@ shouldBe('marquee.hspace', '10');
 debug('"hspace" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" hspace="10">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.hspace=20;
+marquee.hspace = 20;
 shouldBe('marquee.hspace', '20');
 
 debug('"hspace" IDL attribute is 0 when content attribute is negative:');
@@ -84,7 +84,7 @@ shouldBe('marquee.loop', '3');
 debug('"loop" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" loop="3">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.loop=4;
+marquee.loop = 4;
 shouldBe('marquee.loop', '4');
 
 debug('"scrollAmount" IDL attribute reflects content attribute:');
@@ -95,7 +95,7 @@ shouldBe('marquee.scrollAmount', '5');
 debug('"scrollAmount" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" scrollamount="5">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.scrollAmount=6;
+marquee.scrollAmount = 6;
 shouldBe('marquee.scrollAmount', '6');
 
 debug('"scrollDelay" IDL attribute reflects content attribute:');
@@ -106,7 +106,7 @@ shouldBe('marquee.scrollDelay', '50');
 debug('"scrollDelay" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" scrolldelay="50">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.scrollDelay=60;
+marquee.scrollDelay = 60;
 shouldBe('marquee.scrollDelay', '60');
 
 debug('"trueSpeed" IDL attribute reflects content attribute:');
@@ -117,8 +117,21 @@ shouldBeTrue('marquee.trueSpeed');
 debug('"trueSpeed" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" truespeed="true">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.trueSpeed=false;
+marquee.trueSpeed = false;
 shouldBe('marquee.trueSpeed', 'false');
+shouldBe('marquee.hasAttribute("truespeed")', 'false');
+
+debug('"trueSpeed" IDL attribute can be modified:');
+testParent.innerHTML = '<marquee id="marquee" truespeed="true"></marquee>';
+marquee = document.getElementById('marquee');
+marquee.trueSpeed = null;
+shouldBe('marquee.hasAttribute("truespeed")', 'false');
+
+debug('"trueSpeed" IDL attribute can be modified:');
+testParent.innerHTML = '<marquee id="marquee" truespeed="true"></marquee>';
+marquee = document.getElementById('marquee');
+marquee.trueSpeed = undefined;
+shouldBe('marquee.hasAttribute("truespeed")', 'false');
 
 debug('"vspace" IDL attribute reflects content attribute:');
 testParent.innerHTML = '<marquee id="marquee" vspace="10">test</marquee>';
@@ -128,7 +141,7 @@ shouldBe('marquee.vspace', '10');
 debug('"vspace" IDL attribute can be modified:');
 testParent.innerHTML = '<marquee id="marquee" vspace="10">test</marquee>';
 marquee = document.getElementById('marquee');
-marquee.vspace=20;
+marquee.vspace = 20;
 shouldBe('marquee.vspace', '20');
 
 debug('"vspace" IDL attribute is 0 when content attribute is negative:');