Send allocation stats with each class and show in class view.

runtime/bin/vmservice/client/lib/src/elements/class_view.html

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="curly_block.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="instance_ref.html">
 <link rel="import" href="library_ref.html">
 <link rel="import" href="nav_bar.html">
 <link rel="import" href="observatory_element.html">
@@ skipping 68 matching lines @@
               </template>
             </div>
           </div>
         </template>
         <template if="{{ cls.name != cls.vmName }}">
           <div class="memberItem">
             <div class="memberName">vm name</div>
             <div class="memberValue">{{ cls.vmName }}</div>
           </div>
         </template>
-        <div class="memberItem">
-          <div class="memberName">retained size<br>(all instances)</div>
-          <div class="memberValue">
-            <eval-link callback="{{ retainedSize }}"></eval-link>
+
+        <template if="{{ !cls.hasNoAllocations }}">
+        <div class="memberItem">&nbsp;</div>
+          <div class="memberItem">
+            <div class="memberName">current instances</div>
+            <div class="memberValue">
+              {{ cls.newSpace.current.instances + cls.oldSpace.current.instances }}
+            </div>
           </div>
-        </div>
+          <div class="memberItem">
+            <div class="memberName">shallow size</div>

[Cutch, 2014/06/20 18:10:49]

shallow size (of all instances)?

[koda, 2014/06/20 18:37:03]

I made a "current instances" section instead. See attached screenshot.

+            <div class="memberValue">
+              {{ cls.newSpace.current.bytes + cls.oldSpace.current.bytes }}

[Cutch, 2014/06/20 18:10:49]

I think this might double count. I'm not sure the correct solution.

[koda, 2014/06/20 18:37:04]

I think that's true, and that the correct solution is for us to track promotions
in the allocation stats. In any case, this is not the place to fix it, i.e.,
this expression *should* give a meaningful number.

+            </div>
+          </div>
+          <div class="memberItem">
+            <div class="memberName">retained size</div>

[Cutch, 2014/06/20 18:10:49]

(of all instances)?

[koda, 2014/06/20 18:37:04]

See above.

+            <div class="memberValue">
+              <eval-link callback="{{ retainedSize }}"></eval-link>
+            </div>
+          </div>
+        </template>
       </div>
     </div>
 
     <template if="{{ cls.error != null }}">
       <!-- TODO(turnidge): Don't use instance-ref for error display here -->
       <instance-ref ref="{{ cls.error }}"></instance-ref>
     </template>
 
     <hr>
 
@@ skipping 39 matching lines @@
 
     <div class="content">
       <eval-box callback="{{ eval }}"></eval-box>
     </div>
     <br><br><br><br>
     <br><br><br><br>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="class_view.dart"></script>