Reorganize accessibility settings.

chrome/browser/resources/settings/settings_resources.grd

Index: chrome/browser/resources/settings/settings_resources.grd
diff --git a/chrome/browser/resources/settings/settings_resources.grd b/chrome/browser/resources/settings/settings_resources.grd
index b7a50fd1e6030ca4ab8cfedd0217ebc265f4b451..29360e9ecce68b0113ac985f18558aefaeed10c0 100644
--- a/chrome/browser/resources/settings/settings_resources.grd
+++ b/chrome/browser/resources/settings/settings_resources.grd
@@ -21,6 +21,17 @@
                  type="chrome_html"
                  flattenhtml="true"
                  allowexternalscript="true" />
+      <if expr="chromeos">
+        <structure name="IDR_SETTINGS_MANAGE_A11Y_PAGE_JS"
+                   file="a11y_page/manage_a11y_page.js"
+                   flattenhtml="true"
+                   type="chrome_html" />
+        <structure name="IDR_SETTINGS_MANAGE_A11Y_PAGE_HTML"
+                   file="a11y_page/manage_a11y_page.html"
+                   type="chrome_html"
+                   flattenhtml="true"

[Dan Beam, 2016/08/02 18:43:03]

why do you need to flatten?  it's probably better not to

[dmazzoni, 2016/08/03 19:21:48]

I was just copying from above. Do you want to get rid of
it from the rules for a11y_page, too?

[Dan Beam, 2016/08/03 21:19:46]

* preprocess="true" in grd processes <if> and <include>
* flattenhtml="true" does this ^ AND a whole bunch of magical inlining
* allowexternalscript="true" is a dependent option that only has an effect when
flattenhtml="true", I believe, so it's also unlikely to be needed.

a11y_page.html has <if> nodes, therefore it needs one of
{preprocess,flattenhtml}; preprocess does less and is preferred though I
wouldn't muddy your CL with this.

manage_a11y_page.{html,js} have no <if> nor <include>, so don't use these
options there.

+                   allowexternalscript="true" />
+      </if>
       <structure name="IDR_SETTINGS_ABOUT_PAGE_BROWSER_PROXY_HTML"
                  file="about_page/about_page_browser_proxy.html"
                  type="chrome_html" />