diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface.html b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface.html
index 1967b80..5c0535b 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface.html
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface.html
@@ -14,6 +14,7 @@
 limitations under the License.
 -->
 <link rel="import" href="../../../bower_components/polymer/polymer.html">
+<link rel="import" href="../../core/gr-reporting/gr-reporting.html">
 <link rel="import" href="../gr-rest-api-interface/gr-rest-api-interface.html">
 
 <dom-module id="gr-js-api-interface">
@@ -23,4 +24,3 @@
   <script src="gr-js-api-interface.js"></script>
   <script src="gr-public-js-api.js"></script>
 </dom-module>
-
diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
index 97e0a18..2e7c53d 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
@@ -172,5 +172,49 @@
       });
     });
 
+    test('_setPluginsCount', function(done) {
+      stub('gr-reporting', {
+        pluginsLoaded: function() {
+          assert.equal(Gerrit._pluginsPending, 0);
+          done();
+        }
+      });
+      Gerrit._setPluginsCount(0);
+    });
+
+    test('_arePluginsLoaded', function() {
+      assert.isFalse(Gerrit._arePluginsLoaded());
+      Gerrit._setPluginsCount(1);
+      assert.isFalse(Gerrit._arePluginsLoaded());
+      Gerrit._setPluginsCount(0);
+      assert.isTrue(Gerrit._arePluginsLoaded());
+    });
+
+    test('_pluginInstalled', function(done) {
+      stub('gr-reporting', {
+        pluginsLoaded: function() {
+          done();
+        }
+      });
+      Gerrit._setPluginsCount(2);
+      Gerrit._pluginInstalled();
+      assert.equal(Gerrit._pluginsPending, 1);
+      Gerrit._pluginInstalled();
+    });
+
+    test('install calls _pluginInstalled', function() {
+      var stub = sinon.stub(Gerrit, '_pluginInstalled');
+      Gerrit.install(function(p) { plugin = p; }, '0.1',
+          'http://test.com/plugins/testplugin/static/test.js');
+      assert.isTrue(stub.calledOnce);
+      stub.restore();
+    });
+
+    test('install calls _pluginInstalled on error', function() {
+      var stub = sinon.stub(Gerrit, '_pluginInstalled');
+      Gerrit.install(function() {}, '0.0pre-alpha');
+      assert.isTrue(stub.calledOnce);
+      stub.restore();
+    });
   });
 </script>
diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js
index 21d76f1..ad8c135 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-public-js-api.js
@@ -64,6 +64,9 @@
 
   var Gerrit = window.Gerrit || {};
 
+  // Number of plugins to initialize, -1 means 'not yet known'.
+  Gerrit._pluginsPending = -1;
+
   Gerrit.getPluginName = function() {
     console.warn('Gerrit.getPluginName is not supported in PolyGerrit.',
         'Please use self.getPluginName() instead.');
@@ -85,12 +88,14 @@
     if (opt_version && opt_version !== API_VERSION) {
       console.warn('Only version ' + API_VERSION +
           ' is supported in PolyGerrit. ' + opt_version + ' was given.');
+      Gerrit._pluginInstalled();
       return;
     }
 
     // TODO(andybons): Polyfill currentScript for IE10/11 (edge supports it).
     var src = opt_src || (document.currentScript && document.currentScript.src);
     callback(new Plugin(src));
+    Gerrit._pluginInstalled();
   };
 
   Gerrit.getLoggedIn = function() {
@@ -101,5 +106,20 @@
     // NOOP since PolyGerrit doesn’t support GWT plugins.
   };
 
+  Gerrit._setPluginsCount = function(count) {
+    Gerrit._pluginsPending = count;
+    if (Gerrit._arePluginsLoaded()) {
+      document.createElement('gr-reporting').pluginsLoaded();
+    }
+  };
+
+  Gerrit._pluginInstalled = function() {
+    Gerrit._setPluginsCount(Gerrit._pluginsPending - 1);
+  };
+
+  Gerrit._arePluginsLoaded = function() {
+    return Gerrit._pluginsPending === 0;
+  };
+
   window.Gerrit = Gerrit;
 })(window);