fix(divider): Fix stlying for md-divider inside md-list-item.

src/components/divider/demoBasicUsage/index.html

@@ -14,6 +14,7 @@ <h3>{{item.what}}</h3>
           <h4>{{item.who}}</h4>
           <p>{{item.notes}}</p>
         </div>
+        <md-button class="md-secondary">Respond</md-button>
         <md-divider ng-if="!$last"></md-divider>
       </md-list-item>
     </md-list>

src/components/list/list.js

@@ -63,6 +63,10 @@ function mdListDirective($mdTheming) {
  *  </md-list>
  * </hljs>
  *
+ * _**Note:** We automatically apply special styling when the inner contents are wrapped inside
+ * of a `<md-button>` tag. This styling is automatically ignored for `class="md-secondary"` buttons
+ * and you can include a class of `class="md-exclude"` if you need to use a non-secondary button
+ * that is inside the list, but does not wrap the contents._
  */
 function mdListItemDirective($mdAria, $mdConstant, $mdUtil, $timeout) {
   var proxiedTypes = ['md-checkbox', 'md-switch'];
@@ -86,7 +90,7 @@ function mdListItemDirective($mdAria, $mdConstant, $mdUtil, $timeout) {
         }
         if (hasProxiedElement) {
           wrapIn('div');
-        } else if (!tEl[0].querySelector('md-button')) {
+        } else if (!tEl[0].querySelector('md-button:not(.md-secondary):not(.md-exclude)')) {
           tEl.addClass('md-no-proxy');
         }
       } else {

src/components/list/list.scss

@@ -39,6 +39,9 @@ md-list {
 }
 
 md-list-item {
+  // Ensure nested dividers are properly positioned
+  position: relative;
+
   &.md-proxy-focus.md-focused .md-no-style {
     transition: background-color 0.15s linear;
   }

src/components/list/list.spec.js

@@ -132,4 +132,15 @@ describe('mdListItem directive', function() {
     expect(listItem.hasClass('md-no-proxy')).toBeFalsy();
   });
 
+  it('should not detect secondary or excluded md-buttons', function() {
+    var listItem = setup(
+      '<md-list-item>' +
+      '  <div>Content Here</div>' +
+      '  <md-button class="md-secondary" ng-click="sayHello()">Hello</md-button>' +
+      '  <md-button class="md-exclude" ng-click="sayHello()">Hello</md-button>' +
+      '</md-list-item>'
+    );
+    expect(listItem.hasClass('md-no-proxy')).toBeTruthy();
+  });
+
 });