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

base/trace_event/memory_dump_request_args.h

Index: base/trace_event/memory_dump_request_args.h
diff --git a/base/trace_event/memory_dump_request_args.h b/base/trace_event/memory_dump_request_args.h
index 3f74e81ffa67eea30b64f07b5d939c3353fbb2d8..747daabf9eddc8bcf2c7be22bc95bd4c20164801 100644
--- a/base/trace_event/memory_dump_request_args.h
+++ b/base/trace_event/memory_dump_request_args.h
@@ -10,7 +10,6 @@
 
 #include "base/base_export.h"
 #include "base/callback.h"
-#include "base/trace_event/memory_dump_provider.h"
 
 namespace base {
 namespace trace_event {
@@ -21,6 +20,8 @@
   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.
 };
@@ -37,8 +38,6 @@
   uint64 dump_guid;
 
   MemoryDumpType dump_type;
-
-  MemoryDumpArgs dump_args;
 };
 
 }  // namespace trace_event