WebUI cleanup: Remove unused Polymer elements from Desktop builds.

The following elements are only used in ChromeOS, so they don't have
to be included in non-ChromeOS builds

 - iron-input
 - paper-input-container
 - paper-icon-item

Bug:843350,899982

Change-Id: I376e811a6b53fca71ea5a14df479c6f958632547
Reviewed-on: https://chromium-review.googlesource.com/c/1336189Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608206}

ui/webui/resources/polymer_resources.grdp

@@ -128,14 +128,16 @@
              file="../../../third_party/polymer/v1_0/components-chromium/iron-iconset-svg/iron-iconset-svg.html"
              type="chrome_html"
              compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_IRON_INPUT_IRON_INPUT_EXTRACTED_JS"
-             file="../../../third_party/polymer/v1_0/components-chromium/iron-input/iron-input-extracted.js"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_IRON_INPUT_IRON_INPUT_HTML"
-             file="../../../third_party/polymer/v1_0/components-chromium/iron-input/iron-input.html"
-             type="chrome_html"
-             compress="gzip" />
+  <if expr="chromeos">
+    <structure name="IDR_POLYMER_1_0_IRON_INPUT_IRON_INPUT_EXTRACTED_JS"
+               file="../../../third_party/polymer/v1_0/components-chromium/iron-input/iron-input-extracted.js"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_IRON_INPUT_IRON_INPUT_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/iron-input/iron-input.html"
+               type="chrome_html"
+               compress="gzip" />
+  </if>
   <structure name="IDR_POLYMER_1_0_IRON_LIST_IRON_LIST_EXTRACTED_JS"
              file="../../../third_party/polymer/v1_0/components-chromium/iron-list/iron-list-extracted.js"
              type="chrome_html"
@@ -540,50 +542,52 @@
              file="../../../third_party/polymer/v1_0/components-chromium/paper-icon-button/paper-icon-button.html"
              type="chrome_html"
              compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_ADDON_BEHAVIOR_EXTRACTED_JS"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-addon-behavior-extracted.js"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_ADDON_BEHAVIOR_HTML"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-addon-behavior.html"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_CONTAINER_EXTRACTED_JS"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container-extracted.js"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_CONTAINER_HTML"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container.html"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_ERROR_EXTRACTED_JS"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-error-extracted.js"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_ERROR_HTML"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-error.html"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ICON_ITEM_EXTRACTED_JS"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-icon-item-extracted.js"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ICON_ITEM_HTML"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-icon-item.html"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ITEM_BEHAVIOR_EXTRACTED_JS"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-item-behavior-extracted.js"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ITEM_BEHAVIOR_HTML"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-item-behavior.html"
-             type="chrome_html"
-             compress="gzip" />
-  <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ITEM_SHARED_STYLES_HTML"
-             file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-item-shared-styles.html"
-             type="chrome_html"
-             compress="gzip" />
+  <if expr="chromeos">
+    <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_ADDON_BEHAVIOR_EXTRACTED_JS"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-addon-behavior-extracted.js"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_ADDON_BEHAVIOR_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-addon-behavior.html"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_CONTAINER_EXTRACTED_JS"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container-extracted.js"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_CONTAINER_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container.html"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_ERROR_EXTRACTED_JS"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-error-extracted.js"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_INPUT_PAPER_INPUT_ERROR_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-input/paper-input-error.html"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ICON_ITEM_EXTRACTED_JS"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-icon-item-extracted.js"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ICON_ITEM_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-icon-item.html"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ITEM_BEHAVIOR_EXTRACTED_JS"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-item-behavior-extracted.js"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ITEM_BEHAVIOR_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-item-behavior.html"
+               type="chrome_html"
+               compress="gzip" />
+    <structure name="IDR_POLYMER_1_0_PAPER_ITEM_PAPER_ITEM_SHARED_STYLES_HTML"
+               file="../../../third_party/polymer/v1_0/components-chromium/paper-item/paper-item-shared-styles.html"
+               type="chrome_html"
+               compress="gzip" />
+  </if>
   <structure name="IDR_POLYMER_1_0_PAPER_PROGRESS_PAPER_PROGRESS_EXTRACTED_JS"
              file="../../../third_party/polymer/v1_0/components-chromium/paper-progress/paper-progress-extracted.js"
              type="chrome_html"