Enable crash keys for cast shell on android

chromecast/crash/cast_crash_keys.h

Index: chromecast/crash/cast_crash_keys.h
diff --git a/chromecast/crash/cast_crash_keys.h b/chromecast/crash/cast_crash_keys.h
new file mode 100644
index 0000000000000000000000000000000000000000..2f1af20ee8ed0be02a3feeb913eaea735caefe96
--- /dev/null
+++ b/chromecast/crash/cast_crash_keys.h
@@ -0,0 +1,22 @@
+// Copyright 2015 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.
+
+#ifndef CHROMECAST_CRASH_CAST_CRASH_KEYS_H_
+#define CHROMECAST_CRASH_CAST_CRASH_KEYS_H_
+
+#include "base/debug/crash_logging.h"
+
+namespace chromecast {
+namespace crash_keys {
+
+size_t RegisterCastCrashKeys();
+
+extern const char kCurrentApp[];
+extern const char kLastApp[];
+extern const char kPreviousApp[];
+
+}  // namespace chromecast
+}  // namespace crash_keys
+
+#endif  // CHROMECAST_CRASH_CAST_CRASH_KEYS_H_