[Autofill] Update the autocomplete types implementation to match the current HTML spec.

chrome/test/data/autofill/heuristics/input/01_autocomplete_attribute_advanced.html

Index: chrome/test/data/autofill/heuristics/input/01_autocomplete_attribute_advanced.html
diff --git a/chrome/test/data/autofill/heuristics/input/01_autocomplete_attribute_advanced.html b/chrome/test/data/autofill/heuristics/input/01_autocomplete_attribute_advanced.html
new file mode 100644
index 0000000000000000000000000000000000000000..66f8d7df4f7e69110c62fe8a0d14aec0359748e4
--- /dev/null
+++ b/chrome/test/data/autofill/heuristics/input/01_autocomplete_attribute_advanced.html
@@ -0,0 +1,33 @@
+<!-- Whitespace should be trimmed; case should be normalized. -->
+<form action="autocompletetype.html" method="post">
+  <input id="1.n" autocomplete="  NAME "><br>
+  <input id="1.e" autocomplete=" WoRk	 eMaIl"><br>
+  <input id="1.a" autocomplete=" SECTION-one SHIPping street-address	"><br>

[Dan Beam, 2012/10/23 00:28:59]

nit: \n and/or \r IMO

[Ilya Sherman, 2012/10/23 01:06:12]

I don't actually know how to include a line break in an HTML attribute value. 
WebKit seems to strip the tabs anyway, so I'd expect it would strip the newlines
as well.  In short, I don't think it's worth worrying about too much :)

+</form>
+
+<!-- The presence of at least one type hint should disable all other forms of
+     heuristics. -->
+<form action="autocompletetype.html" method="post">
+  <input id="2.name"><br>
+  <input id="2.email"><br>
+  <input id="2.t" autocomplete="tel"><br>
+  <input id="2.address"><br>
+</form>
+
+<!-- This is true even if the attribute value is invalid. -->
+<form action="autocompletetype.html" method="post">
+  <input id="3.name"><br>
+  <input id="3.email"><br>
+  <input id="3.o" autocomplete="other"><br>
+  <input id="3.address"><br>
+</form>
+
+<!-- But special values like "on" or "off" should have no effect. -->
+<form action="autocompletetype.html" method="post">
+  <input id="4.phone"><br>
+  <input id="4.email"><br>
+  <input id="4.a" autocomplete="on"><br>
+  <input id="4.b" autocomplete="oFf "><br>
+  <input id="4.c" autocomplete=""><br>
+  <input id="4.city"><br>
+</form>