add classes trace_analyzer::Query and TraceAnalyzer to improve testing (retry)

base/base.gyp

Index: base/base.gyp
diff --git a/base/base.gyp b/base/base.gyp
index 3003ec80de1a85ec5156517dd4881eeaf2954805..b94a1f5c13c3b53bdf68b653bcb4ee9cb025eb3a 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -240,6 +240,7 @@
         'task_queue_unittest.cc',
         'task_unittest.cc',
         'template_util_unittest.cc',
+        'test/trace_event_analyzer_unittest.cc',
         'threading/non_thread_safe_unittest.cc',
         'threading/platform_thread_unittest.cc',
         'threading/simple_thread_unittest.cc',
@@ -444,6 +445,8 @@
         'test/test_timeouts.h',
         'test/thread_test_helper.cc',
         'test/thread_test_helper.h',
+        'test/trace_event_analyzer.cc',
+        'test/trace_event_analyzer.h',
       ],
     },
     {