Componentize IDR_NET_ERROR_HTML for sharing it with iOS.

components/neterror/resources/neterror.css

Index: components/neterror/resources/neterror.css
diff --git a/chrome/renderer/resources/neterror.css b/components/neterror/resources/neterror.css
similarity index 95%
copy from chrome/renderer/resources/neterror.css
copy to components/neterror/resources/neterror.css
index b4e8186b9e983cc9417cd01b065cc9be63ec5b95..b9ba88b74bfeb95deaa682a392f0e6a4244be4cf 100644
--- a/chrome/renderer/resources/neterror.css
+++ b/components/neterror/resources/neterror.css
@@ -51,8 +51,8 @@ a {
    * renderer process, so embed the resource manually.
    */
   content: -webkit-image-set(
-      url(default_100_percent/common/error_network_generic.png) 1x,
-      url(default_200_percent/common/error_network_generic.png) 2x);
+      url(../../resources/default_100_percent/neterror/error_network_generic.png) 1x,
+      url(../../resources/default_200_percent/neterror/error_network_generic.png) 2x);
 }
 
 .icon-offline {
@@ -99,6 +99,9 @@ a {
 }
 
 #sub-frame-error-details {
+<if expr="is_ios">
+  font-size: 8pt;
+</if>
   color: #8F8F8F;
 <if expr="not is_android and not is_ios">
   /* Not done on mobile for performance reasons. */
@@ -145,8 +148,8 @@ a {
 #search-image {
   content:
       -webkit-image-set(
-          url(../../app/theme/default_100_percent/common/omnibox_search_button_loupe.png) 1x,
-          url(../../app/theme/default_200_percent/common/omnibox_search_button_loupe.png) 2x);
+          url(../../resources/default_100_percent/omnibox/omnibox_search_button_loupe.png) 1x,
+          url(../../resources/default_200_percent/omnibox/omnibox_search_button_loupe.png) 2x);
   margin: auto;
 }