tracing: remove sampling state profiler

base/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 939 matching lines @@
     "trace_event/trace_event_impl.h",
     "trace_event/trace_event_memory_overhead.cc",
     "trace_event/trace_event_memory_overhead.h",
     "trace_event/trace_event_synthetic_delay.cc",
     "trace_event/trace_event_synthetic_delay.h",
     "trace_event/trace_event_system_stats_monitor.cc",
     "trace_event/trace_event_system_stats_monitor.h",
     "trace_event/trace_log.cc",
     "trace_event/trace_log.h",
     "trace_event/trace_log_constants.cc",
-    "trace_event/trace_sampling_thread.cc",
-    "trace_event/trace_sampling_thread.h",
     "trace_event/tracing_agent.cc",
     "trace_event/tracing_agent.h",
     "tracked_objects.cc",
     "tracked_objects.h",
     "tracking_info.cc",
     "tracking_info.h",
     "tuple.h",
     "unguessable_token.cc",
     "unguessable_token.h",
     "value_conversions.cc",
@@ skipping 1482 matching lines @@
     testonly = true
     deps = [
       ":base_java",
     ]
     java_files = [
       "test/android/java/src/org/chromium/base/ContentUriTestUtils.java",
       "test/android/java/src/org/chromium/base/TestSystemMessageHandler.java",
     ]
   }
 }