diff --git a/crash_reporter/user_collector.h b/crash_reporter/user_collector.h
new file mode 100644
index 0000000..7f63224
--- /dev/null
+++ b/crash_reporter/user_collector.h
@@ -0,0 +1,62 @@
+// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef _CRASH_USER_COLLECTOR_H_
+#define _CRASH_USER_COLLECTOR_H_
+
+#include <string>
+
+#include "crash/system_logging.h"
+
+class FilePath;
+
+// User crash collector.
+class UserCollector {
+ public:
+  typedef void (*CountCrashFunction)();
+  typedef bool (*IsFeedbackAllowedFunction)();
+
+  UserCollector();
+
+  // Initialize the user crash collector for detection of crashes,
+  // given a crash counting function, the path to this executable,
+  // metrics collection enabled oracle, and system logger facility.
+  // Crash detection/reporting is not enabled until Enable is
+  // called.
+  void Initialize(CountCrashFunction count_crash,
+                  const std::string &our_path,
+                  IsFeedbackAllowedFunction is_metrics_allowed,
+                  SystemLogging *logger);
+
+  virtual ~UserCollector();
+
+  // Enable collection.
+  bool Enable() { return SetUpInternal(true); }
+
+  // Disable collection.
+  bool Disable() { return SetUpInternal(false); }
+
+  // Handle a specific user crash.
+  void HandleCrash(int signal, int pid, const std::string &exec);
+
+  // Set (override the default) core file pattern.
+  void set_core_pattern_file(const std::string &pattern) {
+    core_pattern_file_ = pattern;
+  }
+
+ private:
+  friend class UserCollectorTest;
+
+  std::string GetPattern(bool enabled) const;
+  bool SetUpInternal(bool enabled);
+
+  std::string core_pattern_file_;
+  CountCrashFunction count_crash_function_;
+  std::string our_path_;
+  bool initialized_;
+  IsFeedbackAllowedFunction is_feedback_allowed_function_;
+  SystemLogging *logger_;
+};
+
+#endif  // _CRASH_USER_COLLECTOR_H_