Revert of Split iOS sdk in to separate targets

webrtc/sdk/objc/Framework/Classes/RTCTracing.mm

+/*
+ *  Copyright 2016 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.
+ */
+
+#import "WebRTC/RTCTracing.h"
+
+#include "webrtc/base/event_tracer.h"
+
+void RTCSetupInternalTracer() {
+  rtc::tracing::SetupInternalTracer();
+}
+
+BOOL RTCStartInternalCapture(NSString *filePath) {
+  return rtc::tracing::StartInternalCapture(filePath.UTF8String);
+}
+
+void RTCStopInternalCapture() {
+  rtc::tracing::StopInternalCapture();
+}
+
+void RTCShutdownInternalTracer() {
+  rtc::tracing::ShutdownInternalTracer();
+}