[tracing] Sanitize process memory dumps for background mode

third_party/WebKit/Source/platform/web_process_memory_dump.cc

 // 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.
 
 #include "platform/web_process_memory_dump.h"
 
 #include "base/memory/discardable_memory.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/heap_profiler_heap_dump_writer.h"
 #include "base/trace_event/process_memory_dump.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "base/trace_event/trace_event_memory_overhead.h"
 #include "platform/web_memory_allocator_dump.h"
 #include "skia/ext/skia_trace_memory_dump_impl.h"
 #include "wtf/text/StringUTF8Adaptor.h"
 
 #include <stddef.h>
 
 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,
     base::trace_event::ProcessMemoryDump* process_memory_dump)
     : process_memory_dump_(process_memory_dump),
       level_of_detail_(level_of_detail) {}
 
 WebProcessMemoryDump::~WebProcessMemoryDump() {
 }
 
@@ skipping 142 matching lines @@
 
 void WebProcessMemoryDump::dumpHeapUsage(
     const base::hash_map<base::trace_event::AllocationContext,
         base::trace_event::AllocationMetrics>& metrics_by_context,
     base::trace_event::TraceEventMemoryOverhead& overhead,
     const char* allocator_name) {
   process_memory_dump_->DumpHeapUsage(metrics_by_context, overhead, allocator_name);
 }
 
 }  // namespace content