[tracing] Sanitize process memory dumps for background mode

third_party/WebKit/Source/platform/web_process_memory_dump.cc

Index: third_party/WebKit/Source/platform/web_process_memory_dump.cc
diff --git a/third_party/WebKit/Source/platform/web_process_memory_dump.cc b/third_party/WebKit/Source/platform/web_process_memory_dump.cc
index 70afbd37131128d649b9bcfe88c0d2b3fd4bd1fb..46f768af55ef2291cae9b0e4c6dfb793976a4bea 100644
--- a/third_party/WebKit/Source/platform/web_process_memory_dump.cc
+++ b/third_party/WebKit/Source/platform/web_process_memory_dump.cc
@@ -21,9 +21,10 @@ namespace blink {
 
 WebProcessMemoryDump::WebProcessMemoryDump()
     : owned_process_memory_dump_(
-          new base::trace_event::ProcessMemoryDump(nullptr)),
-      process_memory_dump_(owned_process_memory_dump_.get()),
-      level_of_detail_(base::trace_event::MemoryDumpLevelOfDetail::DETAILED) {}
+          new base::trace_event::ProcessMemoryDump(nullptr, { base::trace_event::MemoryDumpLevelOfDetail::DETAILED }))
+    , process_memory_dump_(owned_process_memory_dump_.get())
+    , level_of_detail_(base::trace_event::MemoryDumpLevelOfDetail::DETAILED) {
+}
 
 WebProcessMemoryDump::WebProcessMemoryDump(
     base::trace_event::MemoryDumpLevelOfDetail level_of_detail,