Revert of Polymer: Remove unused paper-dialog and paper-dialog-behavior.

third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-common.css

Index: third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-common.css
diff --git a/third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-common.css b/third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-common.css
new file mode 100644
index 0000000000000000000000000000000000000000..560b0a56aa285d7f71129d3747401b40e9711984
--- /dev/null
+++ b/third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-common.css
@@ -0,0 +1,57 @@
+/*
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+
+:host {
+  display: block;
+  margin: 24px 40px;
+
+  background: var(--paper-dialog-background-color, --primary-background-color);
+  color: var(--paper-dialog-color, --primary-text-color);
+
+  @apply(--paper-font-body1);
+  @apply(--shadow-elevation-16dp);
+  @apply(--paper-dialog);
+}
+
+:host > ::content > * {
+  margin-top: 20px;
+  padding: 0 24px;
+}
+
+:host > ::content > .no-padding {
+  padding: 0;
+}
+
+:host > ::content > *:first-child {
+  margin-top: 24px;
+}
+
+:host > ::content > *:last-child {
+  margin-bottom: 24px;
+}
+
+:host > ::content h2 {
+  position: relative;
+  margin: 0;
+  @apply(--paper-font-title);
+
+  @apply(--paper-dialog-title);
+}
+
+:host > ::content .buttons {
+  position: relative;
+  padding: 8px 8px 8px 24px;
+  margin: 0;
+
+  color: var(--paper-dialog-button-color, --primary-color);
+
+  @apply(--layout-horizontal);
+  @apply(--layout-end-justified);
+}