Revert of First pass BackgroundTracingManager.

content/public/browser/background_tracing_preemptive_config.cc

Index: content/public/browser/background_tracing_preemptive_config.cc
diff --git a/content/public/browser/background_tracing_preemptive_config.cc b/content/public/browser/background_tracing_preemptive_config.cc
deleted file mode 100644
index 010109bec3c09a248fe913aaef59879a5ea92243..0000000000000000000000000000000000000000
--- a/content/public/browser/background_tracing_preemptive_config.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2015 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.
-
-#include "content/public/browser/background_tracing_preemptive_config.h"
-
-namespace content {
-
-BackgroundTracingPreemptiveConfig::BackgroundTracingPreemptiveConfig()
-    : BackgroundTracingConfig(BackgroundTracingConfig::PREEMPTIVE_TRACING_MODE),
-      category_preset(BackgroundTracingConfig::BENCHMARK) {
-}
-
-BackgroundTracingPreemptiveConfig::~BackgroundTracingPreemptiveConfig() {
-}
-
-}  // namespace content