ChromeOS: Implement minumal material design OOBE.

chrome/browser/resources/chromeos/login/oobe_icon_button.css

Index: chrome/browser/resources/chromeos/login/oobe_icon_button.css
diff --git a/tools/android/loading/trace_test/tests/1.css b/chrome/browser/resources/chromeos/login/oobe_icon_button.css
similarity index 74%
copy from tools/android/loading/trace_test/tests/1.css
copy to chrome/browser/resources/chromeos/login/oobe_icon_button.css
index 5ae3598668c348eeb78a00dc5c7655ef5837c1b6..95b39f67f579c40201284467f29efe91698fc45e 100644
--- a/tools/android/loading/trace_test/tests/1.css
+++ b/chrome/browser/resources/chromeos/login/oobe_icon_button.css
@@ -3,7 +3,8 @@
  * found in the LICENSE file.
  */
 
-.outside {
-    font-family: inline;
-    color: red;
+#iconButton {
+  height: 24px;
+  padding: 0;
+  width: 24px;
 }