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

ui/webui/resources/polymer_resources.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!--
   This file is generated.
   Please use 'src/tools/polymer/polymer_grdp_to_txt.py' and
   'src/tools/polymer/txt_to_polymer_grdp.py' to modify it, if possible.
 
   'polymer_grdp_to_txt.py' converts 'polymer_resources.grdp' to a plain list of
   used Polymer components:
     ...
     iron-iron-iconset/iron-iconset-extracted.js
@@ skipping 431 matching lines @@
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_BUTTON_PAPER_BUTTON_HTML"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-button/paper-button.html"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_CHECKBOX_PAPER_CHECKBOX_EXTRACTED_JS"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-checkbox/paper-checkbox-extracted.js"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_CHECKBOX_PAPER_CHECKBOX_HTML"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-checkbox/paper-checkbox.html"
              type="chrome_html" />
+  <if expr="chromeos">
+    <structure name="IDR_POLYMER_1_0_PAPER_DIALOG_BEHAVIOR_PAPER_DIALOG_BEHAVIOR_EXTRACTED_JS"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-behavior-extracted.js"
+               type="chrome_html" />
+    <structure name="IDR_POLYMER_1_0_PAPER_DIALOG_BEHAVIOR_PAPER_DIALOG_BEHAVIOR_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-behavior.html"
+               type="chrome_html" />
+    <structure name="IDR_POLYMER_1_0_PAPER_DIALOG_BEHAVIOR_PAPER_DIALOG_COMMON_CSS"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-common.css"
+               type="chrome_html" />
+    <structure name="IDR_POLYMER_1_0_PAPER_DIALOG_BEHAVIOR_PAPER_DIALOG_SHARED_STYLES_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-shared-styles.html"
+               type="chrome_html" />
+    <structure name="IDR_POLYMER_1_0_PAPER_DIALOG_PAPER_DIALOG_EXTRACTED_JS"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-dialog/paper-dialog-extracted.js"
+               type="chrome_html" />
+    <structure name="IDR_POLYMER_1_0_PAPER_DIALOG_PAPER_DIALOG_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-dialog/paper-dialog.html"
+               type="chrome_html" />
+  </if>
   <structure name="IDR_POLYMER_1_0_PAPER_DRAWER_PANEL_PAPER_DRAWER_PANEL_EXTRACTED_JS"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-drawer-panel/paper-drawer-panel-extracted.js"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_DRAWER_PANEL_PAPER_DRAWER_PANEL_HTML"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-drawer-panel/paper-drawer-panel.html"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_FAB_PAPER_FAB_EXTRACTED_JS"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-fab/paper-fab-extracted.js"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_PAPER_FAB_PAPER_FAB_HTML"
@@ skipping 237 matching lines @@
              file="../../../third_party/polymer/v1_0/components-chromium/polymer/polymer-mini.html"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_POLYMER_POLYMER_HTML"
              file="../../../third_party/polymer/v1_0/components-chromium/polymer/polymer.html"
              type="chrome_html" />
   <structure name="IDR_POLYMER_1_0_WEB_ANIMATIONS_JS_WEB_ANIMATIONS_NEXT_LITE_MIN_JS"
              file="../../../third_party/web-animations-js/sources/web-animations-next-lite.min.js"
              type="chrome_html" />
 </grit-part>