Make chrome.exe rendezvous with existing chrome process earlier.

chrome/browser/chrome_process_finder_win.h

+// Copyright 2013 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_CHROME_PROCESS_FINDER_WIN_H_
+#define CHROME_BROWSER_CHROME_PROCESS_FINDER_WIN_H_
+
+#include <windows.h>
+
+namespace base {
+class FilePath;
+}
+
+namespace chrome {
+
+enum NotifyChromeResult {
+  NOTIFY_SUCCESS,
+  NOTIFY_FAILED,
+  NOTIFY_WINDOW_HUNG,
+};
+
+// Finds an already running Chrome window if it exists.
+HWND FindRunningChromeWindow(const base::FilePath& user_data_dir);
+
+// Attempts to send the current command line to an already running instance of
+// Chrome via a WM_COPYDATA message.
+// Returns true if a running Chrome is found and successfully notified.
+NotifyChromeResult AttemptToNotifyRunningChrome(HWND remote_window);
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_CHROME_PROCESS_FINDER_WIN_H_