[tracing] Remove MemoryAllocatorDump::process_memory_dump

base/trace_event/memory_allocator_dump.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_ALLOCATOR_DUMP_H_
 #define BASE_TRACE_EVENT_MEMORY_ALLOCATOR_DUMP_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 51 matching lines @@
   void AddScalar(const char* name, const char* units, uint64_t value);
   void AddScalarF(const char* name, const char* units, double value);
   void AddString(const char* name, const char* units, const std::string& value);
 
   // Absolute name, unique within the scope of an entire ProcessMemoryDump.
   const std::string& absolute_name() const { return absolute_name_; }
 
   // Called at trace generation time to populate the TracedValue.
   void AsValueInto(TracedValue* value) const;
 
-  // Get the ProcessMemoryDump instance that owns this.
-  ProcessMemoryDump* process_memory_dump() const {
-    return process_memory_dump_;
-  }
-
   // Use enum Flags to set values.
   void set_flags(int flags) { flags_ |= flags; }
   void clear_flags(int flags) { flags_ &= ~flags; }
   int flags() { return flags_; }
 
   // |guid| is an optional global dump identifier, unique across all processes
   // within the scope of a global dump. It is only required when using the
   // graph APIs (see TODO_method_name) to express retention / suballocation or
   // cross process sharing. See crbug.com/492102 for design docs.
   // Subsequent MemoryAllocatorDump(s) with the same |absolute_name| are
@@ skipping 13 matching lines @@
   // temporary strings on each AddScalar() call.
   std::string string_conversion_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(MemoryAllocatorDump);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_MEMORY_ALLOCATOR_DUMP_H_