[tracing] Reland of Throttle rate of heavy dumps and support to request light/heavy dumps

base/trace_event/memory_dump_request_args.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_REQUEST_ARGS_H_
 #define BASE_TRACE_EVENT_MEMORY_DUMP_REQUEST_ARGS_H_
 
 // This file defines the types and structs used to issue memory dump requests.
 // These are also used in the IPCs for coordinating inter-process memory dumps.
 
 #include "base/base_export.h"
 #include "base/callback.h"
+#include "base/trace_event/memory_dump_provider.h"
 
 namespace base {
 namespace trace_event {
 
 // Captures the reason why a memory dump is being requested. This is to allow
 // selective enabling of dumps, filtering and post-processing.
 enum class MemoryDumpType {
   TASK_BEGIN,         // Dumping memory at the beginning of a message-loop task.
   TASK_END,           // Dumping memory at the ending of a message-loop task.
   PERIODIC_INTERVAL,  // Dumping memory at periodic intervals.
-  PERIODIC_INTERVAL_WITH_MMAPS,  // As above but w/ heavyweight mmaps dumps.
-                                 // Temporary workaround for crbug.com/499731.
   EXPLICITLY_TRIGGERED,  // Non maskable dump request.
   LAST = EXPLICITLY_TRIGGERED // For IPC macros.
 };
 
 // Returns the name in string for the dump type given.
 BASE_EXPORT const char* MemoryDumpTypeToString(const MemoryDumpType& dump_type);
 
 using MemoryDumpCallback = Callback<void(uint64 dump_guid, bool success)>;
 
 struct BASE_EXPORT MemoryDumpRequestArgs {
   // Globally unique identifier. In multi-process dumps, all processes issue a
   // local dump with the same guid. This allows the trace importers to
   // reconstruct the global dump.
   uint64 dump_guid;
 
   MemoryDumpType dump_type;
+
+  MemoryDumpArgs dump_args;
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_MEMORY_DUMP_REQUEST_ARGS_H_