Add an update warning for downloading over mobile data

chrome/browser/resources/settings/about_page/update_warning_dialog.html

Index: chrome/browser/resources/settings/about_page/update_warning_dialog.html
diff --git a/chrome/browser/resources/settings/about_page/update_warning_dialog.html b/chrome/browser/resources/settings/about_page/update_warning_dialog.html
new file mode 100644
index 0000000000000000000000000000000000000000..38026cce414c5225d63cb28e3563755f8dc1c8f2
--- /dev/null
+++ b/chrome/browser/resources/settings/about_page/update_warning_dialog.html
@@ -0,0 +1,27 @@
+<link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
+<link rel="import" href="chrome://resources/html/i18n_behavior.html">
+<link rel="import" href="chrome://resources/html/polymer.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
+<link rel="import" href="about_page_browser_proxy.html">
+<link rel="import" href="../settings_shared_css.html">
+
+<dom-module id="settings-update-warning-dialog">
+  <template>
+    <style include="settings-shared"></style>
+    <dialog is="cr-dialog" id="dialog" close-text="$i18n{close}">
+      <div class="title">$i18n{aboutUpdateWarningTitle}</div>
+      <div class="body">
+        <div id="update-warning-message"></div>
+      </div>
+      <div class="button-container">
+        <paper-button id="cancel" class="cancel-button"
+            on-tap="onCancelTap_">$i18n{cancel}</paper-button>
+        <paper-button id="continue" class="action-button"
+            on-tap="onContinueTap_">
+          $i18n{aboutUpdateWarningContinue}
+        </paper-button>
+      </div>
+    </dialog>
+  </template>
+  <script src="update_warning_dialog.js"></script>
+</dom-module>