Add retry logic for FindThreadIDWithSyscall()

components/crash/content/browser/crash_handler_host_linux.h

Index: components/crash/content/browser/crash_handler_host_linux.h
diff --git a/components/crash/content/browser/crash_handler_host_linux.h b/components/crash/content/browser/crash_handler_host_linux.h
index 4052d639d84ba288c29981db6bdd95567cd76298..57fb2e6ee0898f77e980dc10bf0b7afa64491575 100644
--- a/components/crash/content/browser/crash_handler_host_linux.h
+++ b/components/crash/content/browser/crash_handler_host_linux.h
@@ -15,6 +15,7 @@
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/sequenced_worker_pool.h"
+#include "components/crash/content/app/breakpad_linux_impl.h"
 
 namespace base {
 class Thread;
@@ -71,6 +72,16 @@ class CrashHandlerHostLinux : public base::MessageLoopForIO::Watcher,
   // Continue OnFileCanReadWithoutBlocking()'s work on the IO thread.
   void QueueCrashDumpTask(std::unique_ptr<BreakpadInfo> info, int signal_fd);
 
+  // Find crashing thread (may delay and retry) and dump on IPC thread.
+  void FindCrashingThreadAndDump(pid_t crashing_pid,
+                                 const std::string& expected_syscall_data,
+                                 std::unique_ptr<char[]> crash_context,
+                                 std::unique_ptr<CrashKeyStorage> crash_keys,
+                                 uint64_t uptime,
+                                 size_t oom_size,
+                                 int signal_fd,
+                                 int attempt);
+
   std::string process_type_;
   base::FilePath dumps_path_;
 #if !defined(OS_ANDROID)