MD Settings: remove button-ness of magnifying glass in subpage search

chrome/browser/resources/settings/settings_page/settings_subpage_search.html

Index: chrome/browser/resources/settings/settings_page/settings_subpage_search.html
diff --git a/chrome/browser/resources/settings/settings_page/settings_subpage_search.html b/chrome/browser/resources/settings/settings_page/settings_subpage_search.html
index be683d57e7230c3406eb4fc29707bc90c0b17382..2f84151f48d79664f7640b07fd4580b14a4237e6 100644
--- a/chrome/browser/resources/settings/settings_page/settings_subpage_search.html
+++ b/chrome/browser/resources/settings/settings_page/settings_subpage_search.html
@@ -1,6 +1,7 @@
 <link rel="import" href="chrome://resources/cr_elements/cr_search_field/cr_search_field_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input-container.html">
 
@@ -33,6 +34,12 @@
         width: 24px;
       }
 
+      #searchIcon {
+        height: 16px;
+        padding: 4px;
+        width: 16px;
+      }
+
       paper-input-container {
         display: inline-block;
         width: 160px;  /* Special width for search input. */
@@ -64,7 +71,7 @@
         -webkit-margin-start: 4px;
       }
     </style>
-    <paper-icon-button id="searchIcon" icon="cr:search"></paper-icon-button>
+    <iron-icon id="searchIcon" icon="cr:search"></iron-icon>
     <paper-input-container no-label-float>
       <label id="prompt">[[label]]</label>
       <input id="searchInput" type="search" on-search="onSearchTermSearch"