Improve accessible name calculation on Windows.

content/test/data/accessibility/input-text-name-calc-expected-win.txt

Index: content/test/data/accessibility/input-text-name-calc-expected-win.txt
diff --git a/content/test/data/accessibility/input-text-name-calc-expected-win.txt b/content/test/data/accessibility/input-text-name-calc-expected-win.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b9fb916d98811dd3c8862df1887f7a7c51078f82
--- /dev/null
+++ b/content/test/data/accessibility/input-text-name-calc-expected-win.txt
@@ -0,0 +1,12 @@
+ROLE_SYSTEM_DOCUMENT name='' READONLY FOCUSABLE description=''
+    IA2_ROLE_SECTION name='' READONLY description=''
+        ROLE_SYSTEM_TEXT name='Title' FOCUSABLE description=''
+        ROLE_SYSTEM_TEXT name='Label' FOCUSABLE description='Title'
+        ROLE_SYSTEM_TEXT name='AriaLabel' FOCUSABLE description='Title'
+        ROLE_SYSTEM_TEXT name='LabelledBy' FOCUSABLE description='Title'
+        ROLE_SYSTEM_TEXT name='Placeholder' FOCUSABLE description=''

[aboxhall, 2012/08/01 01:56:57]

Placeholder is not mentioned in the accessible name computation either, but I
agree it makes sense to use it in this way (including combining it with the
title).

[dmazzoni, 2012/08/01 03:22:41]

It's here:
http://www.w3.org/TR/html-aapi/#calc

Were you looking at the ARIA platform implementation guide? I looked at that one
too, but the AAPI seemed to be a little more specific about how to apply it to
platform-specific attributes.

It's quite possible they conflict. :(

[aboxhall, 2012/08/06 01:55:49]

Yep, I was looking at the ARIA guide. They don't quite conflict (both agree on
the label > title > placeholder precedence order), but they are a bit ambiguous
taken together where the description is concerned.

+        ROLE_SYSTEM_TEXT name='Title' FOCUSABLE description='Placeholder'
+        ROLE_SYSTEM_TEXT name='Label' FOCUSABLE description='Title Placeholder'
+        ROLE_SYSTEM_TEXT name='AriaLabel' FOCUSABLE description='Title Placeholder'
+        ROLE_SYSTEM_TEXT name='LabelledBy' FOCUSABLE description='Title Placeholder'
+        ROLE_SYSTEM_TEXT name='LabelledBy' FOCUSABLE description='DescribedBy Placeholder'

[aboxhall, 2012/08/01 01:56:57]

I'm not sure we want to include the placeholder if there is an aria-describedby
attribute. I would expect developers to include all necessary information in the
description. Do other browsers do it this way?

[aboxhall, 2012/08/06 01:55:49]

I still think this shouldn't include the placeholder, at least going by my
reading of the specs. If there is a precedent for this, and you think this is
better, then I guess an argument could be made, but based on the spec I don't
see why you'd include placeholder, and especially not placeholder but not title,
given title has a higher precedence.