Remove remains of webrtc/base

webrtc/base/event_tracer.h

Index: webrtc/base/event_tracer.h
diff --git a/webrtc/base/event_tracer.h b/webrtc/base/event_tracer.h
deleted file mode 100644
index b6da14a47b8b0f92be24044838e9328a6cf3926d..0000000000000000000000000000000000000000
--- a/webrtc/base/event_tracer.h
+++ /dev/null
@@ -1,34 +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_BASE_EVENT_TRACER_H_
-#define WEBRTC_BASE_EVENT_TRACER_H_
-
-
-// This header is deprecated and is just left here temporarily during
-// refactoring. See https://bugs.webrtc.org/7634 for more details.
-#include "webrtc/rtc_base/event_tracer.h"
-
-#endif  // WEBRTC_BASE_EVENT_TRACER_H_