MD Settings: Bring <settings-dialog> closer to dialog spec.

chrome/browser/resources/settings/settings_dialog.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icons/iron-icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-dialog-behavior/paper-dialog-behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-dialog-behavior/paper-dialog-shared-styles.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 
 <dom-module id="settings-dialog">
   <template>
     <style include="paper-dialog-shared-styles"></style>
     <style>
       .body-content {
+        display: flex;
+        flex-direction: column;
         font-size: 1em;
-        margin: 20px 0;
+        min-height: 120px;
       }
 
       .dialog-content {
         -webkit-padding-end: 0;
         -webkit-padding-start: 0;
         margin-bottom: 0;
         margin-top: 0;
       }
 
       .footer-container {
         margin: 0;
         padding: 0;
       }
 
       .top-row {
         align-items: center;
-        border-bottom: 1px solid var(--paper-grey-300);
+        border-bottom: 1px solid rgba(0, 0, 0, 0.14);
         display: flex;
-        padding-bottom: 5px;
-        padding-top: 5px;
+        font-size: 16px;

[dschuyler, 2016/04/16 00:31:16]

Please use a percentage of current font
size instead of a fixed font size. (with
the percentage bringing the font size to
16px).

[dpapad, 2016/04/16 01:09:51]

Done. (Also moved the font-size style further down within the ":host ::content
.title" selector).

+        height: 52px;

[dschuyler, 2016/04/16 00:31:16]

will min-height work here? I'm wondering
if a 'very large' font would clip with this
setting.

[dpapad, 2016/04/16 01:09:51]

Done, min-height seems to work just as fine.

+      }
+
+      paper-icon-button {
+        height: 20px;
+        margin: 16px;
+        padding: 0;
+        width: 20px;
       }
 
       :host {
         max-width: 800px;
-        min-width: 500px;
+        min-width: 512px;
         overflow: auto;
       }
 
       :host ::content .body {
-        margin-bottom: 35px;
+        flex: 1;
+        margin: 12px 0 24px 0;
       }
 
       :host ::content .button-container {
         display: flex;
         justify-content: flex-end;
+        margin-bottom: 12px;
       }
 
       :host ::content .button-container .cancel-button {
+        -webkit-margin-end: 8px;
         color: var(--paper-grey-600);
         font-weight: 500;
       }
 
       :host ::content .footer {
         background-color: var(--paper-grey-200);
         margin: 0;
         padding: 20px;
       }
 
@@ skipping 28 matching lines @@
         <content select=".body"></content>
         <content select=".button-container"></content>
       </div>
     </div>
     <div class="footer-container">
       <content select=".footer"></content>
     </div>
   </template>
   <script src="settings_dialog.js"></script>
 </dom-module>