Revert 155122 - Code to collect issue 97285 debugging info for crash reports.

content/public/common/content_debug_logging.h

-// 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.
-
-#ifndef CONTENT_PUBLIC_BROWSER_CONTENT_DEBUG_LOGGING_H_
-#define CONTENT_PUBLIC_BROWSER_CONTENT_DEBUG_LOGGING_H_
-
-#include "content/common/content_export.h"
-
-#include <string>
-#include <vector>
-
-// When debugging single processes, a common technique is to store
-// breakpad keys which can be analyzed from crashes.  That technique
-// does not work well for multi-process bugs.  This code can
-// be used to implement a ring buffer in the browser which stores the
-// most-recent N (browser-defined) messages relating to a bug.
-//
-// The intent is that users will call RecordMsg() to record info for
-// the bug, and GetMessages() to fetch the recorded info.  In the
-// browser process, these will be backed by a local data structure.
-// In other processes, they will be backed by messages forwarding to
-// the browser process.
-
-// TODO(shess): Since bug notes will be distributed across the code,
-// it would be inconvenient to require some other include to have
-// kBugNNNNN constants for users to use.  Those could be in this file,
-// but for now they're a DCHECK in chrome_delegate_main.cc (which
-// implements the actual storage).
-
-namespace content {
-namespace debug {
-
-// RecordMsg() and GetMessages() forward to the handlers set by
-// RegisterMessageHandlers().  If no handlers are set (or NULL
-// handlers are set), the messages are simply dropped.
-//
-// If GetMessages() returns false, there was no handler (or the
-// handler was unable to get messages).  *msgs will be cleared.  If
-// GetMessages() returns true, zero or more of the most recent
-// messages previously sent to RecordMsg() will be in *msgs, in the
-// order recorded, mod things like forwarded delay between processes.
-CONTENT_EXPORT void RecordMsg(int bug_id, const std::string& msg);
-CONTENT_EXPORT bool GetMessages(int bug_id, std::vector<std::string>* msgs);
-
-// Used to register handlers which will differ per process.
-typedef void RecordMsgFn(int bug_id, const std::string& msg);
-typedef bool GetMessagesFn(int bug_id, std::vector<std::string>* msgs);
-CONTENT_EXPORT void RegisterMessageHandlers(RecordMsgFn* record_handler,
-                                            GetMessagesFn* get_handler);
-
-// TODO(shess): It would be convenient to expose functions to do things like:
-// - load values into breakpad.
-// - load values into breakpad and dump without crashing.
-// - load values into breakpad and crash.
-// - log values to the console.
-// But this is mostly Chromium-level stuff.
-
-}  // namespace debug
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_BROWSER_CONTENT_DEBUG_LOGGING_H_