I don't see filter in the list of supported html5 kits on the mobile chrome page: https://developers.google.com/chrome/mobile/docs/overview granted, it is not excluded but it is also not explicitly mentioned.
I did however find this article: Blur effect on the entire webpage
which links to this jsFiddle: http://jsfiddle.net/9qnsz/2/
That successfully blurs the page and doesn't require a toolkit that is unavailable.
It isn't super clean, you just overlay multiple controls and make them semi-transparent, but it might be useful in whatever you want to accomplish.
The contents of the fiddle are:
<div class="container">
<div class="overlay">
<p>Please register etc etc...</p>
</div>
<form action="javascript:;" class="form0">
<input type="text" value="Username" />
<input type="text" value="Password" />
<button>Submit</button>
</form>
<form action="javascript:;" class="form1">
<input type="text" value="Username" />
<input type="text" value="Password" />
<button>Submit</button>
</form>
<form action="javascript:;" class="form2">
<input type="text" value="Username" />
<input type="text" value="Password" />
<button>Submit</button>
</form>
<form action="javascript:;" class="form3">
<input type="text" value="Username" />
<input type="text" value="Password" />
<button>Submit</button>
</form>
<form action="javascript:;" class="form4">
<input type="text" value="Username" />
<input type="text" value="Password" />
<button>Submit</button>
</form>
.container {
width:500px;
height:500px;
position:relative;
border:1px solid #CCC;
}
form {
position:absolute;
left:10px;
top:10px;
}
form.form0 {
left:11px;
top:11px;
opacity:0.1;
}
form.form1 {
left:8px;
top:8px;
opacity:0.1;
zoom:1.02;
}
form.form2 {
left:11px;
top:11px;
opacity:0.1;
zoom:1.01;
}
form.form3 {
left:9px;
top:9px;
opacity:0.2;
}
form.form4 {
left:11px;
top:11px;
opacity:0.1;
}
.overlay {
width:250px;
height:250px;
margin-top:50px;
margin-left:auto;
margin-right:auto;
border:1px solid #666;
/* background:#FFF;*/
}
