memory-infra: Finish moving to Mojo (2nd attempt)

components/tracing/child/child_memory_dump_manager_delegate_impl.h

Index: components/tracing/child/child_memory_dump_manager_delegate_impl.h
diff --git a/components/tracing/child/child_memory_dump_manager_delegate_impl.h b/components/tracing/child/child_memory_dump_manager_delegate_impl.h
deleted file mode 100644
index fc27d96f279dc284ddcff403d2969832b26e3680..0000000000000000000000000000000000000000
--- a/components/tracing/child/child_memory_dump_manager_delegate_impl.h
+++ /dev/null
@@ -1,85 +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.
-
-#ifndef COMPONENTS_TRACING_CHILD_CHILD_MEMORY_DUMP_MANAGER_DELEGATE_IMPL_H_
-#define COMPONENTS_TRACING_CHILD_CHILD_MEMORY_DUMP_MANAGER_DELEGATE_IMPL_H_
-
-#include "base/trace_event/memory_dump_manager.h"
-
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/singleton.h"
-#include "base/synchronization/lock.h"
-#include "components/tracing/tracing_export.h"
-
-namespace base {
-class SingleThreadTaskRunner;
-}  // namespace base
-
-namespace tracing {
-
-class ChildTraceMessageFilter;
-
-// This class is a simple proxy class between the MemoryDumpManager and the
-// ChildTraceMessageFilter. It's only purpose is to adapt the lifetime of
-// CTMF to the demands of MDM, which expects the delegate to be thread-safe
-// and long lived. CTMF, instead, can be torn down during browser shutdown.
-// This class is registered as MDM delegate in child processes and handles
-// gracefully (and thread-safely) failures in the case of a lack of the CTMF.
-class TRACING_EXPORT ChildMemoryDumpManagerDelegateImpl
-    : public base::trace_event::MemoryDumpManagerDelegate {
- public:
-  static ChildMemoryDumpManagerDelegateImpl* GetInstance();
-
-  // base::trace_event::MemoryDumpManagerDelegate implementation.
-  void RequestGlobalMemoryDump(
-      const base::trace_event::MemoryDumpRequestArgs& args,
-      const base::trace_event::MemoryDumpCallback& callback) override;
-  uint64_t GetTracingProcessId() const override;
-
-  void SetChildTraceMessageFilter(ChildTraceMessageFilter* ctmf);
-
-  // Pass kInvalidTracingProcessId to invalidate the id.
-  void set_tracing_process_id(uint64_t id) {
-    DCHECK(tracing_process_id_ ==
-               base::trace_event::MemoryDumpManager::kInvalidTracingProcessId ||
-           id ==
-               base::trace_event::MemoryDumpManager::kInvalidTracingProcessId ||
-           id == tracing_process_id_);
-    tracing_process_id_ = id;
-  }
-
- protected:
-  // Make CreateProcessDump() visible to ChildTraceMessageFilter.
-  friend class ChildTraceMessageFilter;
-
- private:
-  friend struct base::DefaultSingletonTraits<
-      ChildMemoryDumpManagerDelegateImpl>;
-
-  ChildMemoryDumpManagerDelegateImpl();
-  ~ChildMemoryDumpManagerDelegateImpl() override;
-
-  ChildTraceMessageFilter* ctmf_;  // Not owned.
-
-  // The SingleThreadTaskRunner where the |ctmf_| lives.
-  // It is NULL iff |cmtf_| is NULL.
-  scoped_refptr<base::SingleThreadTaskRunner> ctmf_task_runner_;
-
-  // Protects from concurrent access to |ctmf_task_runner_| to allow
-  // RequestGlobalMemoryDump to be called from arbitrary threads.
-  base::Lock lock_;
-
-  // The unique id of the child process, created for tracing and is expected to
-  // be valid only when tracing is enabled.
-  uint64_t tracing_process_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChildMemoryDumpManagerDelegateImpl);
-};
-
-}  // namespace tracing
-
-#endif  // COMPONENTS_TRACING_CHILD_CHILD_MEMORY_DUMP_MANAGER_DELEGATE_IMPL_H_