Move //mojo/services/X/public/... to //mojo/services/X/... (part 3).

mojo/services/tracing/public/interfaces/tracing.mojom

-// Copyright 2014 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.
-
-[DartPackage="mojo_services"]
-module tracing;
-
-// To participate in the tracing ecosystem, implement the TraceProvider
-// interface and connect to the tracing app. Then, when the provider's Start()
-// function is called collect tracing data and pass it back via the provided
-// TraceRecorder interface up until Stop() is called.
-
-interface TraceProvider {
-  // Categories can either be the empty string to mean the default set of
-  // categories or a comma-delimited list of categories to trace.
-  StartTracing(string categories, TraceRecorder recorder);
-  StopTracing();
-};
-
-interface TraceRecorder {
-  Record(string json);
-};
-
-interface TraceCollector {
-  // Request tracing data from all connected providers to stream to
-  // |stream|.
-  Start(handle<data_pipe_producer> stream, string categories);
-
-  // Stop tracing and flush results to the |stream| passed in to Start().
-  // Closes |stream| when all data is collected.
-  StopAndFlush();
-};