ChromeOS OOBE: display icons specific to screen DPI.

chrome/browser/resources/chromeos/login/oobe_welcome_dialog.html

Index: chrome/browser/resources/chromeos/login/oobe_welcome_dialog.html
diff --git a/chrome/browser/resources/chromeos/login/oobe_welcome_dialog.html b/chrome/browser/resources/chromeos/login/oobe_welcome_dialog.html
index 11b374c09a5d87d92b3ab017d8ba3824e23bdfff..125a476bde026e53d5a92260536cc679203950f3 100644
--- a/chrome/browser/resources/chromeos/login/oobe_welcome_dialog.html
+++ b/chrome/browser/resources/chromeos/login/oobe_welcome_dialog.html
@@ -26,17 +26,23 @@
         <div class="flex"></div>
         <div id="buttons" class="layout horizontal center">
           <oobe-welcome-secondary-button id="languageSelectionButton"
-              icon="icons:language" on-tap="onLanguageClicked_"
+              icon1x="oobe-welcome-32:language"

[jdufault, 2017/03/15 16:51:40]

I'm okay with leaving as is because being explicit is always nice, but I think
it would be cleaner if we automatically appended the 32/64 because as is there
is some duplication and the oobe-dialog interface is now tied to hd-iron-icon.

+              icon2x="oobe-welcome-64:language"
+              on-tap="onLanguageClicked_"
               label-for-aria$="[[formatMessage_('languageButtonLabel',
                   currentLanguage)]]">
             <div>[[currentLanguage]]</div>
           </oobe-welcome-secondary-button>
           <oobe-welcome-secondary-button id="accessibilitySettingsButton"
-              icon="icons:accessibility" on-tap="onAccessibilityClicked_">
+              icon1x="oobe-welcome-32:accessibility"
+              icon2x="oobe-welcome-64:accessibility"
+              on-tap="onAccessibilityClicked_">
             <div i18n-content="accessibilityLink"></div>
           </oobe-welcome-secondary-button>
           <oobe-welcome-secondary-button id="timezoneSettingsButton"
-              icon="oobe-welcome-64:timezone" on-tap="onTimezoneClicked_"
+              icon1x="oobe-welcome-32:timezone"
+              icon2x="oobe-welcome-64:timezone"
+              on-tap="onTimezoneClicked_"
               hidden="[[!timezoneButtonVisible]]">
             <div i18n-content="timezoneButtonText"></div>
           </oobe-welcome-secondary-button>