MD WebUI: Fix appearance of toolbar title in certain languages

ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-media-query/iron-media-query.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_toolbar/cr_toolbar_search_field.html">
 
 <dom-module id="cr-toolbar">
   <template>
     <style>
       :host {
         --cr-toolbar-field-width: 580px;
         --cr-toolbar-height: 56px;
         color: #fff;
         display: flex;
         height: var(--cr-toolbar-height);
       }
 
       h1 {
         -webkit-margin-start: 6px;
+        -webkit-padding-end: 2px;
         flex: 1;
         font-size: 123%;
         font-weight: 400;
         text-overflow: ellipsis;
         overflow: hidden;
         white-space: nowrap;
       }
 
       #leftContent {
         -webkit-margin-start: 18px;
@@ skipping 21 matching lines @@
 
       :host([narrow_]) #centeredContent {
         -webkit-padding-end: var(--cr-toolbar-field-end-padding, 12px);
       }
 
       :host(:not([narrow_])) h1 {
         @apply(--cr-toolbar-header-wide);
       }
 
       :host(:not([narrow_])) #leftContent {
-        max-width: calc((100% - var(--cr-toolbar-field-width) - 18px) / 2);
+        max-width: calc((100% - var(--cr-toolbar-field-width)) / 2 - 18px);

[dpapad, 2016/11/17 18:49:29]

Can you add a comment explaining the rationale of this calculation? It is not
obvious.

[tsergeant, 2016/11/18 00:03:06]

Done. In the process, I realised I could change the box sizing to get rid of the
18px magic number, so I've done that too.

         @apply(--cr-toolbar-left-content-wide);
       }
 
       :host(:not([narrow_])) #rightContent {
         @apply(--cr-toolbar-right-content-wide);
       }
 
       :host([narrow_]) #centeredContent {
         justify-content: flex-end;
       }
@@ skipping 78 matching lines @@
       <iron-media-query query="(max-width: 900px)" query-matches="{{narrow_}}">
       </iron-media-query>
     </div>
 
     <div id="rightContent">
       <content select=".more-actions"></content>
     </div>
   </template>
   <script src="cr_toolbar.js"></script>
 </dom-module>