Remove old system_wrappers event_tracer.h.

Replaced by webrtc/base/event_tracer.h and no longer used.

BUG=
R=tommi@webrtc.org

Review URL: https://codereview.webrtc.org/1421463008

Cr-Commit-Position: refs/heads/master@{#10537}

webrtc/system_wrappers/BUILD.gn

@@ -22,7 +22,6 @@ static_library("system_wrappers") {
     "include/data_log.h",
     "include/data_log_c.h",
     "include/data_log_impl.h",
-    "include/event_tracer.h",
     "include/event_wrapper.h",
     "include/field_trial.h",
     "include/file_wrapper.h",
@@ -67,7 +66,6 @@ static_library("system_wrappers") {
     "source/event_timer_posix.h",
     "source/event_timer_win.cc",
     "source/event_timer_win.h",
-    "source/event_tracer.cc",
     "source/file_impl.cc",
     "source/file_impl.h",
     "source/logging.cc",

webrtc/system_wrappers/include/event_tracer.h

@@ -1,33 +0,0 @@
-/*
- *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-// This file defines the interface for event tracing in WebRTC.
-//
-// Event log handlers are set through SetupEventTracer(). User of this API will
-// provide two function pointers to handle event tracing calls.
-//
-// * GetCategoryEnabledPtr
-//   Event tracing system calls this function to determine if a particular
-//   event category is enabled.
-//
-// * AddTraceEventPtr
-//   Adds a tracing event. It is the user's responsibility to log the data
-//   provided.
-//
-// Parameters for the above two functions are described in trace_event.h.
-
-#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_EVENT_TRACER_H_
-#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_EVENT_TRACER_H_
-
-// This file has moved.
-// TODO(tommi): Delete after removing dependencies and updating Chromium.
-#include "webrtc/base/event_tracer.h"
-
-#endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_EVENT_TRACER_H_

webrtc/system_wrappers/source/event_tracer.cc

@@ -1,12 +0,0 @@
-/*
- *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-// This file has moved.
-// TODO(tommi): Delete after removing dependencies and updating Chromium.

webrtc/system_wrappers/source/event_tracer_unittest.cc

@@ -1,12 +0,0 @@
-/*
- *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-// This file has moved.
-// TODO(tommi): Delete after removing dependencies and updating Chromium.

webrtc/system_wrappers/system_wrappers.gyp

@@ -28,7 +28,6 @@
         'include/data_log.h',
         'include/data_log_c.h',
         'include/data_log_impl.h',
-        'include/event_tracer.h',
         'include/event_wrapper.h',
         'include/field_trial.h',
         'include/file_wrapper.h',
@@ -77,7 +76,6 @@
         'source/event_timer_posix.h',
         'source/event_timer_win.cc',
         'source/event_timer_win.h',
-        'source/event_tracer.cc',
         'source/file_impl.cc',
         'source/file_impl.h',
         'source/logcat_trace_context.cc',

webrtc/system_wrappers/system_wrappers_tests.gyp

@@ -23,7 +23,6 @@
         'source/clock_unittest.cc',
         'source/condition_variable_unittest.cc',
         'source/critical_section_unittest.cc',
-        'source/event_tracer_unittest.cc',
         'source/logging_unittest.cc',
         'source/data_log_unittest.cc',
         'source/data_log_unittest_disabled.cc',