Patch to try dump-on-DCHECK.

base/logging.cc

Index: base/logging.cc
diff --git a/base/logging.cc b/base/logging.cc
index a5f9e1141817b21e82d6fae32b17e8aa3cc6fca0..4790ca84a9d6d083348ed93797ce87f5084f9a29 100644
--- a/base/logging.cc
+++ b/base/logging.cc
@@ -59,6 +59,7 @@ typedef pthread_mutex_t* MutexHandle;
 #include "base/command_line.h"
 #include "base/debug/alias.h"
 #include "base/debug/debugger.h"
+#include "base/debug/dump_without_crashing.h"
 #include "base/debug/stack_trace.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/strings/string_piece.h"
@@ -333,6 +334,19 @@ void CloseLogFileUnlocked() {
 
 }  // namespace
 
+#if defined(DCHECK_IS_DUMP_WITHOUT_CRASH)
+// Used to implement dump-on-DCHECK. See crbug.com/596231.
+void DCheckDumpWithoutCrashing() {
+  // To ensure we don't risk spamming Crash with dump-on-DCHECK reports we log
+  // only the first[*] DCHECK to fail once DumpWithoutCrashing() is working.
+  // [*] This is racey, but in the pathological case still only results in one
+  // dump per-racing-thread, rather than our aim of one per-process.
+  static bool dump_on_dcheck = true;
+  if (dump_on_dcheck)
+    dump_on_dcheck = !base::debug::DumpWithoutCrashing();
+}
+#endif
+
 LoggingSettings::LoggingSettings()
     : logging_dest(LOG_DEFAULT),
       log_file(nullptr),