Add trace metadata to detect albatross build

Albatross builds are official builds with DCHECK_ON.
Traces collected from these build are subject to performance
issues and should be tagger to ease filtering.

Change-Id: Idde7cde4a54ea867fce49b6f03d1557e7bec2030
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2323142
Commit-Queue: Etienne Bergeron <etienneb@chromium.org>
Reviewed-by: oysteine <oysteine@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#792592}

content/browser/tracing/tracing_controller_impl.cc

@@ -13,6 +13,7 @@
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/cpu.h"
+#include "base/dcheck_is_on.h"
 #include "base/files/file_tracing.h"
 #include "base/logging.h"
 #include "base/run_loop.h"
@@ -257,6 +258,10 @@ TracingControllerImpl::GenerateMetadataDict() {
 #endif  // defined(OS_ANDROID)
   metadata_dict->SetInteger("chrome-bitness", 8 * sizeof(uintptr_t));
 
+#if DCHECK_IS_ON()
+  metadata_dict->SetInteger("chrome-dcheck-on", 1);
+#endif
+
   // OS
 #if defined(OS_CHROMEOS)
   metadata_dict->SetString("os-name", "CrOS");

services/tracing/public/cpp/trace_event_args_allowlist.cc

@@ -108,6 +108,7 @@ const AllowlistEntry kEventArgsAllowlist[] = {
     {nullptr, nullptr, nullptr}};
 
 const char* kMetadataAllowlist[] = {"chrome-bitness",
+                                    "chrome-dcheck-on",
                                     "chrome-library-name",
                                     "clock-domain",
                                     "config",