CrOS: Add print statements to help debug BrowserProcessImpl::Unpin crash.

chrome/browser/browser_process_impl.cc

 // Copyright (c) 2012 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 "chrome/browser/browser_process_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
 #include <utility>
 #include <vector>
 
 #include "base/atomic_ref_count.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
+#include "base/debug/alias.h"
 #include "base/debug/crash_logging.h"
+#include "base/debug/dump_without_crashing.h"
 #include "base/debug/leak_annotations.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/path_service.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 1307 matching lines @@
 #endif
 
 #if defined(LEAK_SANITIZER)
   // Check for memory leaks now, before we start shutting down threads. Doing
   // this early means we won't report any shutdown-only leaks (as they have
   // not yet happened at this point).
   // If leaks are found, this will make the process exit immediately.
   __lsan_do_leak_check();
 #endif
 
+  // TODO(sammiequon): This is used to help debug the crash in crbug.com/660962.
+  // Remove this when the crash is fixed or if verified to not be related to
+  // this.
+  if (!base::MessageLoop::current()->is_running()) {
+    std::string debug_info = KeepAliveRegistry::GetInstance()->ToString();
+    char debug_buffer[100];
+    base::strlcpy(debug_buffer, debug_info.c_str(), arraysize(debug_buffer));
+    base::debug::Alias(&debug_buffer);
+    base::debug::DumpWithoutCrashing();
+  }
+
   CHECK(base::MessageLoop::current()->is_running());
 
 #if defined(OS_MACOSX)
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::Bind(ChromeBrowserMainPartsMac::DidEndMainMessageLoop));
 #endif
   base::MessageLoop::current()->QuitWhenIdle();
 
 #if !defined(OS_ANDROID)
   chrome::ShutdownIfNeeded();
@@ skipping 57 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)