[Findit] Use step level analysis to exclude flaky test failures.

appengine/findit/waterfall/test/data/m_b_124_abc_test.json

Index: appengine/findit/waterfall/test/data/m_b_124_abc_test.json
diff --git a/appengine/findit/waterfall/test/data/m_b_124_abc_test.json b/appengine/findit/waterfall/test/data/m_b_124_abc_test.json
new file mode 100644
index 0000000000000000000000000000000000000000..db337cb072907d3c21f6b557e8a49ba41527c68a
--- /dev/null
+++ b/appengine/findit/waterfall/test/data/m_b_124_abc_test.json
@@ -0,0 +1,116 @@
+{
+    "timestamp": "2015-05-20 02:54:17.691218",
+    "gtest_results": {
+        "disabled_tests": [],
+        "global_tags": [],
+        "all_tests": [
+            "Unittest1.Subtest1",
+            "Unittest1.Subtest2",
+            "Unittest2.Subtest1",
+            "Unittest2.Subtest2"
+        ],
+        "per_iteration_data": [
+            {
+                "Unittest1.Subtest1": [
+                    {
+                        "elapsed_time_ms": 1,
+                        "losless_snippet": true,
+                        "output_snippet": "[       OK ]",
+                        "status": "SUCCESS",
+                        "output_snippet_base64": "WyBSVU4gICAgICBdIExheWVyQW5pbWF0aW9"
+                    }
+                ],
+                "Unittest1.Subtest2": [
+                    {
+                        "elapsed_time_ms": 66,
+                        "losless_snippet": true,
+                        "output_snippet": "a/b/u1s2.cc:1234: Failure",
+                        "status": "FAILURE",
+                        "output_snippet_base64": "WyBSVU4gICAgICBdIExheWVyQW5pbWF0aW9"
+                    },
+                    {
+                        "elapsed_time_ms": 64,
+                        "losless_snippet": true,
+                        "output_snippet": "a/b/u1s2.cc:1234: Failure",
+                        "status": "FAILURE",
+                        "output_snippet_base64": "WyBSVU4gICAgICBdIExheWVyQW5pbWF0aW9"
+                    },
+                    {
+                        "elapsed_time_ms": 50,
+                        "losless_snippet": true,
+                        "output_snippet": "[       OK ]",
+                        "status": "SUCCESS",
+                        "output_snippet_base64": "WyBSVU4gICAgICBdIExheWVyQW5pbWF0aW9"
+                    }
+                ],
+                "Unittest2.Subtest1": [
+                    {
+                        "elapsed_time_ms": 56,
+                        "losless_snippet": true,
+                        "output_snippet": "a/b/u2s1.cc:567: Failure\\n[2]: 2594735000 bogo-microseconds\\n",
+                        "status": "FAILURE",
+                        "output_snippet_base64": "WyBSVU4gICAgICBdIExheWVyQW5pbWF0aW9"
+                    },
+                    {
+                        "elapsed_time_ms": 58,
+                        "losless_snippet": true,
+                        "output_snippet": "[       OK ]",
+                        "status": "SUCCESS",
+                        "output_snippet_base64": "WyBSVU4gICAgICBdIExheWVyQW5pbWF0aW9"
+                    }
+                ],
+                "Unittest2.Subtest2": [
+                    {
+                        "elapsed_time_ms": 1,
+                        "losless_snippet": true,
+                        "output_snippet": "[       OK ]",
+                        "status": "SUCCESS",
+                        "output_snippet_base64": "WyBSVU4gICAgICBdIExheWVyQW5pbWF0aW9"
+                    }
+                ]
+            }
+        ]
+    },
+    "version": 1,
+    "build_properties": {
+        "parent_wk_revision": null,
+        "parent_got_v8_revision": null,
+        "parent_got_swarming_client_revision": null,
+        "parent_build_archive_url": null,
+        "git_revision": null,
+        "recipe": null,
+        "parent_revision": null,
+        "parent_slavename": null,
+        "project": null,
+        "parent_scheduler": null,
+        "parentname": null,
+        "parent_buildnumber": null,
+        "slavename": null,
+        "blamelist": [],
+        "branch": null,
+        "patchset": null,
+        "issue": null,
+        "revision": null,
+        "workdir": null,
+        "repository": null,
+        "buildername": null,
+        "parent_try_job_key": null,
+        "mastername": null,
+        "parent_got_webkit_revision": null,
+        "parent_builddir": null,
+        "parent_branch": null,
+        "scheduler": null,
+        "requester": null,
+        "parent_cr_revision": null,
+        "rietveld": null,
+        "parent_got_nacl_revision": null,
+        "parent_buildername": null,
+        "parent_got_revision": null,
+        "buildnumber": null,
+        "requestedAt": null,
+        "patch_url": null,
+        "parent_git_number": null,
+        "parentslavename": null
+    },
+    "test_exe": "unittests"
+}