Rename tracing interfaces.

mojo/common/trace_controller_impl.h

-// 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.
-
-#ifndef MOJO_COMMON_TRACING_CONTROLLER_IMPL_H_
-#define MOJO_COMMON_TRACING_CONTROLLER_IMPL_H_
-
-#include "base/memory/ref_counted_memory.h"
-#include "mojo/public/cpp/bindings/interface_request.h"
-#include "mojo/public/cpp/bindings/strong_binding.h"
-#include "mojo/services/tracing/public/interfaces/tracing.mojom.h"
-
-namespace mojo {
-
-class TraceControllerImpl : public tracing::TraceController {
- public:
-  explicit TraceControllerImpl(
-      InterfaceRequest<tracing::TraceController> request);
-  ~TraceControllerImpl() override;
-
-  // Set to true if base::trace_event::TraceLog is enabled externally to this
-  // class. If this is set to true this class will save the collector but not
-  // enable tracing when it receives a StartTracing message from the tracing
-  // service.
-  void set_tracing_already_started(bool tracing_already_started) {
-    tracing_already_started_ = tracing_already_started;
-  }
-
- private:
-  // tracing::TraceController implementation:
-  void StartTracing(const String& categories,
-                    tracing::TraceDataCollectorPtr collector) override;
-  void StopTracing() override;
-
-  void SendChunk(const scoped_refptr<base::RefCountedString>& events_str,
-                 bool has_more_events);
-
-  bool tracing_already_started_;
-  tracing::TraceDataCollectorPtr collector_;
-  StrongBinding<tracing::TraceController> binding_;
-
-  DISALLOW_COPY_AND_ASSIGN(TraceControllerImpl);
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_COMMON_TRACING_CONTROLLER_IMPL_H_