[MD settings] set scroll target for custom word spellings subpage

chrome/browser/resources/settings/languages_page/edit_dictionary_page.html

Index: chrome/browser/resources/settings/languages_page/edit_dictionary_page.html
diff --git a/chrome/browser/resources/settings/languages_page/edit_dictionary_page.html b/chrome/browser/resources/settings/languages_page/edit_dictionary_page.html
index a248625552d215c8a7c4d492b4bc3e357616ea46..7220488e44cb90a64f2da3205e6d7fa9448906cf 100644
--- a/chrome/browser/resources/settings/languages_page/edit_dictionary_page.html
+++ b/chrome/browser/resources/settings/languages_page/edit_dictionary_page.html
@@ -5,6 +5,7 @@
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.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.html">
+<link rel="import" href="../global_scroll_target_behavior.html">
 <link rel="import" href="../prefs/prefs.html">
 <link rel="import" href="../prefs/prefs_behavior.html">
 <link rel="import" href="../settings_shared_css.html">
@@ -21,11 +22,6 @@
         width: var(--paper-input-max-width);
       }
 
-      iron-list {
-        /* TODO(michaelpg): Size to fit the viewport. */
-        height: 300px;
-      }
-
       iron-list .word {
         flex: 1;
       }
@@ -50,7 +46,8 @@
       <h2>$i18n{customDictionaryWords}</h2>
       <div class="list-frame">
         <template is="dom-if" if="[[hasWords_(words_.length)]]">
-          <iron-list id="list" items="{{words_}}">
+          <iron-list id="list" items="{{words_}}"
+              scroll-target="[[subpageScrollTarget]]">
             <template>
               <div class="list-item">
                 <div class="word text-elide">[[item]]</div>