Linux: split GNOME Keyring integration into a separate process.

chrome/browser/password_manager/keyring_proxy/message_reader.h

+// Copyright (c) 2011 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_BROWSER_PASSWORD_MANAGER_KEYRING_PROXY_MESSAGE_READER_H_
+#define CHROME_BROWSER_PASSWORD_MANAGER_KEYRING_PROXY_MESSAGE_READER_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+namespace keyring_proxy {
+
+// This class handles reading bits and pieces of input data and assembling them
+// into a set of newline-delimited lines. Each message is terminated by a blank
+// line. (Think HTTP, SMTP, etc.)
+// It is used in the (tiny) helper binary as well as the browser process, so it
+// must not have any dependencies beyond standard libraries.
+class MessageReader {
+ public:
+  MessageReader() : is_complete_(false) { lines_.resize(1); }
+
+  // Returns the number of characters actually used; on end-of-message,
+  // this may be smaller than |size|, but should otherwise be equal.
+  // It is an error to call HandleData() if is_complete() would return true.
+  size_t HandleData(const char* data, size_t size);
+
+  bool is_complete() const { return is_complete_; }
+  const std::vector<std::string>& lines() const { return lines_; }
+
+  // Resets internal state so the reader will be ready for another message.
+  void Reset() {
+    lines_.clear();
+    lines_.resize(1);
+    is_complete_ = false;
+  }
+
+ private:
+  bool is_complete_;
+  std::vector<std::string> lines_;
+};
+
+}  // namespace keyring_proxy
+
+#endif  // CHROME_BROWSER_PASSWORD_MANAGER_KEYRING_PROXY_MESSAGE_READER_H_