memory-infra: Add SUMMARY_ONLY MemoryDumpType

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 0f42a185310bf10ff68803f1aba29dc3dc44be2f..b083efbe3b3656da21aeffd51cc55c628840c5d0 100644
--- a/base/trace_event/memory_dump_request_args.h
+++ b/base/trace_event/memory_dump_request_args.h
@@ -28,7 +28,8 @@ enum class MemoryDumpType {
   PERIODIC_INTERVAL,     // Dumping memory at periodic intervals.
   EXPLICITLY_TRIGGERED,  // Non maskable dump request.
   PEAK_MEMORY_USAGE,     // Dumping memory at detected peak total memory usage.
-  LAST = PEAK_MEMORY_USAGE  // For IPC macros.
+  SUMMARY_ONLY,          // Calculate just the summary & don't add to the trace.

[fmeawad, 2017/04/25 15:37:18]

This CL leaves the code insconsistent with memory_instrumentation.mojom

+  LAST = SUMMARY_ONLY    // For IPC macros.
 };
 
 // Tells the MemoryDumpProvider(s) how much detailed their dumps should be.