Create a common directory of widgets and css.

appengine/chromium_rietveld/new_static/components/cr-issue-patchset.html

 <!-- Copyright (c) 2014 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file. -->
 
-<link rel="import" href="cr-action.html">
+<link rel="import" href="../common/cr-action.html">
+<link rel="import" href="../common/cr-toolbar.html">
 <link rel="import" href="cr-issue-patchfile.html">
-<link rel="import" href="cr-toolbar.html">
 <link rel="import" href="cr-try-results.html">
 
 <polymer-element name="cr-issue-patchset" attributes="patchset mode">
     <template>
-        <link rel="stylesheet" href="common.css">
+        <link rel="stylesheet" href="../common/common.css">
         <link rel="stylesheet" href="cr-issue-patchset.css">
         <template if="{{ patchset.sourceFiles.length }}">
             <header>
                 <h2>Files</h2>
                 <div class="ui-actions">
                     <a is="cr-action" on-tap="{{ expandAllDiffs }}">Show diffs</a> /
                     <a is="cr-action" on-tap="{{ collapseAllDiffs }}">Hide diffs</a> /
                     <a href="/download/issue{{ patchset.issue.id }}_{{ patchset.id }}.diff" target="_blank">Raw diff</a>
                     <label class="side-by-side">
                         <input type="checkbox" checked="{{ sideBySide }}">
@@ skipping 70 matching lines @@
                     return file.hideDiff();
                 }));
             },
             handleAddMore: function() {
                 this.fire("show-try-dialog");
             },
         });
     })();
     </script>
 </polymer-element>