ChromeOS OOBE: switch from iron-dropdown to <select>.

chrome/browser/resources/settings/md_select_css.html

Index: chrome/browser/resources/settings/md_select_css.html
diff --git a/chrome/browser/resources/settings/md_select_css.html b/chrome/browser/resources/settings/md_select_css.html
deleted file mode 100644
index 2e1768f803097039da5194858cd9735eace85f80..0000000000000000000000000000000000000000
--- a/chrome/browser/resources/settings/md_select_css.html
+++ /dev/null
@@ -1,62 +0,0 @@
-<link rel="import" href="/settings_vars_css.html">
-
-<dom-module id="md-select">
-  <template>
-    <style>
-      .md-select {
-        --md-arrow-width: 0.9em;
-        -webkit-appearance: none;
-        /* Ensure that the text does not overlap with the down arrow. */
-        -webkit-padding-end: calc(var(--md-arrow-width) * 1.8);
-        background: url(images/arrow_down.svg) 97% center no-repeat;
-        background-size: var(--md-arrow-width);
-        border-bottom: 1px solid var(--paper-grey-300);
-        border-left: none;
-        /* Override Mac's default border-radius */
-        border-radius: 0;
-        border-right: none;
-        border-top: none;
-        color: var(--primary-text-color);
-        cursor: pointer;
-        font-family: inherit;
-        font-size: inherit;
-        outline: none;
-        padding-bottom: 3px;
-        padding-top: 3px;
-        width: var(--md-select-width, 200px);
-      }
-
-      /* Mirroring paper-dropdown-menu disabled style. */
-      .md-select[disabled] {
-        border-bottom: 1px dashed var(--secondary-text-color);
-        color: var(--secondary-text-color);
-        opacity: 0.33;
-        pointer-events: none;
-      }
-
-      :host-context([dir=rtl]) .md-select {
-        background-position-x: 3%;
-      }
-
-      .md-select-underline {
-        border-top: 2px solid var(--google-blue-500);
-        display: block;
-        position: relative;
-        top: -1px;
-        transform: scale3d(0, 1, 1);
-        transition: transform 200ms ease-in;
-        width: 100%;
-      }
-
-      .md-select:focus + .md-select-underline {
-        transform: scale3d(1, 1, 1);
-        transition: transform 200ms ease-out;
-      }
-
-      .md-select-wrapper {
-        display: inline-block;
-        max-width: 100%;
-      }
-    </style>
-  </template>
-</dom-module>