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

base/trace_event/memory_dump_manager.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_MANAGER_H_
 #define BASE_TRACE_EVENT_MEMORY_DUMP_MANAGER_H_
 
 #include <set>
 
 #include "base/atomicops.h"
@@ skipping 42 matching lines @@
   // |mdp| will be issues on the given thread. Otherwise, the |mdp| should be
   // able to handle calls on arbitrary threads.
   void RegisterDumpProvider(
       MemoryDumpProvider* mdp,
       const scoped_refptr<SingleThreadTaskRunner>& task_runner);
   void RegisterDumpProvider(MemoryDumpProvider* mdp);
   void UnregisterDumpProvider(MemoryDumpProvider* mdp);
 
   // Requests a memory dump. The dump might happen or not depending on the
   // filters and categories specified when enabling tracing.
+  // The |dump_args| is used to specify the dump's level of detail.
   // The optional |callback| is executed asynchronously, on an arbitrary thread,
   // to notify about the completion of the global dump (i.e. after all the
   // processes have dumped) and its success (true iff all the dumps were
   // successful).
   void RequestGlobalDump(MemoryDumpType dump_type,
+                         const MemoryDumpArgs& dump_args,
                          const MemoryDumpCallback& callback);
 
   // Same as above (still asynchronous), but without callback.
-  void RequestGlobalDump(MemoryDumpType dump_type);
+  void RequestGlobalDump(MemoryDumpType dump_type,
+                         const MemoryDumpArgs& dump_args);
 
   // TraceLog::EnabledStateObserver implementation.
   void OnTraceLogEnabled() override;
   void OnTraceLogDisabled() override;
 
   // Returns the MemoryDumpSessionState object, which is shared by all the
   // ProcessMemoryDump and MemoryAllocatorDump instances through all the tracing
   // session lifetime.
   const scoped_refptr<MemoryDumpSessionState>& session_state() const {
     return session_state_;
@@ skipping 162 matching lines @@
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MemoryDumpManagerDelegate);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_MEMORY_DUMP_MANAGER_H_