UI for setting/clearing closure-specific breakpoints.

runtime/observatory/lib/src/elements/instance_view.html

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="class_ref.html">
 <link rel="import" href="error_view.html">
 <link rel="import" href="eval_box.html">
 <link rel="import" href="eval_link.html">
 <link rel="import" href="field_ref.html">
 <link rel="import" href="function_ref.html">
 <link rel="import" href="inbound_reference.html">
 <link rel="import" href="instance_ref.html">
 <link rel="import" href="observatory_element.html">
@@ skipping 77 matching lines @@
                 </function-ref>
               </div>
             </div>
             <div class="memberItem">
               <div class="memberName">closure context</div>
               <div class="memberValue">
                 <any-service-ref ref="{{ instance.context }}">
                 </any-service-ref>
               </div>
             </div>
+            <div class="memberItem">
+              <div class="memberName">closure breakpoint</div>
+              <div class="memberValue">
+                <template if="{{ instance.activationBreakpoint == null }}">
+                  <action-link callback="{{ setBreakOnActivation }}"
+                               label="break on activation">
+                  </action-link>
+                </template>
+                <template if="{{ instance.activationBreakpoint != null }}">
+                  {{ instance.activationBreakpoint.toString() }}
+                  <action-link callback="{{ clearBreakOnActivation }}"
+                               label="remove">
+                  </action-link>
+                </template>
+              </div>
+            </div>
           </template>
 
           <template if="{{ instance.isWeakProperty }}">
             <div class="memberItem">
               <div class="memberName">key</div>
               <div class="memberValue">
                 <any-service-ref ref="{{ instance.key }}">
                 </any-service-ref>
               </div>
             </div>
@@ skipping 106 matching lines @@
         </template>
 
       </div>
 
     </template>
     <view-footer></view-footer>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="instance_view.dart"></script>