memory-infra: Move dump level check to observer and rename session state

base/trace_event/memory_dump_session_state.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 BASE_TRACE_EVENT_MEMORY_DUMP_SESSION_STATE_H_
-#define BASE_TRACE_EVENT_MEMORY_DUMP_SESSION_STATE_H_
-
-#include <memory>
-#include <set>
-
-#include "base/base_export.h"
-#include "base/trace_event/heap_profiler_stack_frame_deduplicator.h"
-#include "base/trace_event/heap_profiler_type_name_deduplicator.h"
-#include "base/trace_event/memory_dump_request_args.h"
-
-namespace base {
-namespace trace_event {
-
-// Container for state variables that should be shared across all the memory
-// dumps in a tracing session.
-class BASE_EXPORT MemoryDumpSessionState
-    : public RefCountedThreadSafe<MemoryDumpSessionState> {
- public:
-  MemoryDumpSessionState();
-
-  // Returns the stack frame deduplicator that should be used by memory dump
-  // providers when doing a heap dump.
-  StackFrameDeduplicator* stack_frame_deduplicator() const {
-    return stack_frame_deduplicator_.get();
-  }
-
-  void SetStackFrameDeduplicator(
-      std::unique_ptr<StackFrameDeduplicator> stack_frame_deduplicator);
-
-  // Returns the type name deduplicator that should be used by memory dump
-  // providers when doing a heap dump.
-  TypeNameDeduplicator* type_name_deduplicator() const {
-    return type_name_deduplicator_.get();
-  }
-
-  void SetTypeNameDeduplicator(
-      std::unique_ptr<TypeNameDeduplicator> type_name_deduplicator);
-
-  void SetAllowedDumpModes(
-      std::set<MemoryDumpLevelOfDetail> allowed_dump_modes);
-
-  bool IsDumpModeAllowed(MemoryDumpLevelOfDetail dump_mode) const;
-
-  void set_heap_profiler_breakdown_threshold_bytes(uint32_t value) {
-    heap_profiler_breakdown_threshold_bytes_ = value;
-  }
-
-  uint32_t heap_profiler_breakdown_threshold_bytes() const {
-    return heap_profiler_breakdown_threshold_bytes_;
-  }
-
- private:
-  friend class RefCountedThreadSafe<MemoryDumpSessionState>;
-  ~MemoryDumpSessionState();
-
-  // Deduplicates backtraces in heap dumps so they can be written once when the
-  // trace is finalized.
-  std::unique_ptr<StackFrameDeduplicator> stack_frame_deduplicator_;
-
-  // Deduplicates type names in heap dumps so they can be written once when the
-  // trace is finalized.
-  std::unique_ptr<TypeNameDeduplicator> type_name_deduplicator_;
-
-  std::set<MemoryDumpLevelOfDetail> allowed_dump_modes_;
-
-  uint32_t heap_profiler_breakdown_threshold_bytes_;
-};
-
-}  // namespace trace_event
-}  // namespace base
-
-#endif  // BASE_TRACE_EVENT_MEMORY_DUMP_SESSION_STATE_H_