Switch chrome_elf exception handling from breakpad to crashpad.

chrome_elf/blacklist/crashpad_helper.h

Index: chrome_elf/blacklist/crashpad_helper.h
diff --git a/chrome_elf/blacklist/crashpad_helper.h b/chrome_elf/blacklist/crashpad_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..d5a781b60772aafe7f61ff66a2b5ea6480deb669
--- /dev/null
+++ b/chrome_elf/blacklist/crashpad_helper.h
@@ -0,0 +1,15 @@
+// Copyright 2016 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 CHROME_ELF_BLACKLIST_CRASHPAD_HELPER_H_
+#define CHROME_ELF_BLACKLIST_CRASHPAD_HELPER_H_
+
+#include <windows.h>
+
+// Exception handler for exceptions in chrome_elf which need to be passed on to
+// the next handler in the chain. Examples include exceptions in DllMain,
+// blacklist interception code, etc.
+int GenerateCrashDump(EXCEPTION_POINTERS* exception_pointers);
+
+#endif  // CHROME_ELF_BLACKLIST_CRASHPAD_HELPER_H_