Apply object updates from the network without blowing away object identity or UI attributes.

Tools/GardeningServer/model/test/ct-failure-tests.html

Index: Tools/GardeningServer/model/test/ct-failure-tests.html
diff --git a/Tools/GardeningServer/model/test/ct-failure-tests.html b/Tools/GardeningServer/model/test/ct-failure-tests.html
index 7bdffc3486a9de546436a1a41ef3f92d1ee85091..3d6c12e8d9cc16db58b96021db96fedae23bfa0e 100644
--- a/Tools/GardeningServer/model/test/ct-failure-tests.html
+++ b/Tools/GardeningServer/model/test/ct-failure-tests.html
@@ -15,15 +15,18 @@ describe('ct-failure model', function() {
   var tests = [
     {
       failure: new CTFailure('browser_tests', 'FooTest.Bar', {}, 123, 123),
-      expectedGroupName: 'FooTest'
+      expectedGroupName: 'FooTest',
+      expectedFingerprint: 'browser_tests::FooTest.Bar',
     },
     {
       failure: new CTFailure('webkit_tests', 'fast/text/foo.html', {}, 123, 123),
-      expectedGroupName: 'fast/text'
+      expectedGroupName: 'fast/text',
+      expectedFingerprint: 'webkit_tests::fast/text/foo.html',
     },
     {
       failure: new CTFailure('compile', undefined, {}, 123, 123),
-      expectedGroupName: undefined
+      expectedGroupName: undefined,
+      expectedFingerprint: 'compile::undefined',
     }
   ];
   it('group name', function() {
@@ -31,6 +34,11 @@ describe('ct-failure model', function() {
       assert.equal(test.failure.reasonGroupName(), test.expectedGroupName);
     });
   });
+  it('has fingerprint', function() {
+    tests.forEach(function(test) {
+      assert.propertyVal(test.failure, 'fingerprint', test.expectedFingerprint);
+    });
+  });
 });
 
 })();