about:tracing support for TRACE_ASYNC_START/FINISH events.

chrome/browser/resources/tracing/tests/nonnested_trace.json

Index: chrome/browser/resources/tracing/tests/nonnested_trace.json
diff --git a/chrome/browser/resources/tracing/tests/nonnested_trace.json b/chrome/browser/resources/tracing/tests/nonnested_trace.json
deleted file mode 100644
index ec4e1ae16d4594bac1939b3f784e7f226e4c2ffd..0000000000000000000000000000000000000000
--- a/chrome/browser/resources/tracing/tests/nonnested_trace.json
+++ /dev/null
@@ -1,23 +0,0 @@
-[
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 826, "ph": "B",
-      "name": "A", "args": {}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 827, "ph": "B",
-      "name": "Asub", "args": {}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 829, "ph": "B",
-      "name": "NonNest", "args": {"id": "1", "ui-nest": "0"}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 830, "ph": "B",
-      "name": "NonNest", "args": {"id": "2", "ui-nest": "0"}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 831, "ph": "E",
-      "name": "Asub", "args": {}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 832, "ph": "E",
-      "name": "NonNest", "args": {"id": "1", "ui-nest": "0"}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 833, "ph": "E",
-      "name": "NonNest", "args": {"id": "2", "ui-nest": "0"}},
-  {"cat": "PERF", "pid": 22630, "tid": 22630, "ts": 834, "ph": "E",
-      "name": "A", "args": {}},
-
-  {"cat": "PERF", "pid": 22630, "tid": 22631, "ts": 827, "ph": "B",
-      "name": "A", "args": {}},
-  {"cat": "PERF", "pid": 22630, "tid": 22631, "ts": 854, "ph": "E",
-      "name": "A", "args": {}}
-]