Elim cr_button from md-settings

ui/webui/resources/cr_elements/v1_0/demo_element.html

 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-checkbox/paper-checkbox.html">
-<link rel="import" href="chrome://resources/cr_elements/v1_0/cr_button/cr_button.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_collapse/cr_collapse.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_input/cr_input.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_toggle_button/cr_toggle_button.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/network/cr_network_icon.html">
 
 <dom-module id="cr-demo-element">
   <link rel="import" type="css" href="demo_element.css">
   <template>
-    <h3>cr-button</h3>
-    <div class="layout vertical">
-      <div class="layout horizontal">
-        <cr-button>Button1</cr-button>
-        <cr-button>Button2</cr-button>
-        <cr-button>Button3</cr-button>
-      </div>
-      <cr-button raised>Raised Button</cr-button>
-      <div class="layout horizontal">
-        <cr-button toggles>Toggle Button1</cr-button>
-        <cr-button toggles>Toggle Button2</cr-button>
-      </div>
-    </div>
-
     <h3>cr-input</h3>
     <div class="layout vertical">
       <div class="layout horizontal">
         <cr-input label="CrInput1" value="{{inputValues.1}}"></cr-input>
         <span>InputValue.1=</span>
         <span>[[inputValues.1]]</span>
       </div>
       <div class="layout horizontal">
         <cr-input label="CrInput2" value="{{inputValues.2}}"></cr-input>
         <cr-input label="CrInput3" value="{{inputValues.3}}"></cr-input>
@@ skipping 27 matching lines @@
       <cr-expand-button expanded="{{collapseOpened}}">
         Collapse 1
       </cr-expand-button>
       <cr-collapse opened="[[collapseOpened]]">
         <div class="layout vertical">
           <span>Collapsable Section 1</span>
           <paper-checkbox>Advanced option 1</paper-checkbox>
           <paper-checkbox>Advanced option 2</paper-checkbox>
         </div>
       </cr-collapse>
-      <cr-button toggles active="{{collapseOpened2}}">
+      <paper-button toggles active="{{collapseOpened2}}">
         Collapse 2
-      </cr-button>
+      </paper-button>
       <cr-collapse opened="[[collapseOpened2]]">
         <div class="layout vertical">
           <span>Collapsable Section 2</span>
         </div>
       </cr-collapse>
     </div>
 
     <cr-expand-button toggles expanded="{{networkOpened}}">
       <span class="heading">cr-network-*</span>
     </cr-expand-button>
@@ skipping 15 matching lines @@
             </cr-network-icon>
             <span>Cellular (16px)</span>
           </div>
         </div>
       </div>
     </cr-collapse>
 
   </template>
   <script src="demo_element.js"></script>
 </dom-module>