MD Settings: Add Learn More button to the Passwords subpage

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

Index: chrome/browser/resources/settings/settings_page/settings_subpage.html
diff --git a/chrome/browser/resources/settings/settings_page/settings_subpage.html b/chrome/browser/resources/settings/settings_page/settings_subpage.html
index 951ef6d072d526d7a6000d31ee54f29fea8e7449..73789e203525d8faa868dfe08038d91d1b3c26b9 100644
--- a/chrome/browser/resources/settings/settings_page/settings_subpage.html
+++ b/chrome/browser/resources/settings/settings_page/settings_subpage.html
@@ -1,7 +1,9 @@
 <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/iron-resizable-behavior/iron-resizable-behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable-behavior.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-ripple/paper-ripple.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner.html">
 <link rel="import" href="../icons.html">
 <link rel="import" href="../route.html">
@@ -26,6 +28,16 @@
         -webkit-margin-start: 4px;
       }
 
+      #learnMore {
+        @apply(--cr-paper-icon-button-margin);
+        align-items: center;
+        display: flex;
+        height: var(--cr-icon-ripple-size);
+        justify-content: center;
+        position: relative;  /* Needed for paper-ripple. */
+        width: var(--cr-icon-ripple-size);
+      }
+
       paper-icon-button {
         /* Centers the ripple on the icon with appropriate margin on right. */
         -webkit-margin-end: 8px;
@@ -44,7 +56,8 @@
       }
 
       settings-subpage-search {
-        -webkit-margin-start: auto;
+        /* Keep normal icon spacing from subpage-title-extra controls. */
+        -webkit-margin-start: 16px;
       }
     </style>
     <div class="settings-box first">
@@ -52,15 +65,22 @@
           aria-label="$i18n{back}">
       </paper-icon-button>
       <h1>[[pageTitle]]</h1>
+      <content select=".subpage-title-extra"></content>
+      <template is="dom-if" if="[[learnMoreUrl]]">
+        <a id="learnMore" aria-label="$i18n{learnMore}"
+            href="[[learnMoreUrl]]" target="_blank">
+          <iron-icon icon="settings:help-outline"></iron-icon>
+          <paper-ripple class="circle" center></paper-ripple>
+        </a>
+      </template>
       <template is="dom-if" if="[[searchLabel]]">
         <settings-subpage-search label="[[searchLabel]]"
             on-search-changed="onSearchChanged_">
         </settings-subpage-search>
       </template>
       <template is="dom-if" if="[[showSpinner]]">
-        <paper-spinner active></paper-spinner>          
+        <paper-spinner active></paper-spinner>
       </template>
-      <content select=".subpage-title-extra"></content>
     </div>
     <content></content>
   </template>