Remove PRODUCT_STRING_PATH from chrome_constants.h on Windows.

chrome/common/metrics_constants_util_win.h

+// 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.
+
+// A handful of resource-like constants related to the Chrome application.
+
+#ifndef CHROME_COMMON_METRICS_CONSTANTS_UTIL_WIN_H_
+#define CHROME_COMMON_METRICS_CONSTANTS_UTIL_WIN_H_
+
+#include "base/strings/string16.h"
+
+namespace chrome {
+
+// Returns the registry path where crash dump attempts are stored for this
+// product. This is used by metrics and crash reporting.
+base::string16 GetBrowserCrashDumpAttemptsRegistryPath();
+
+// Returns the registry path where exit code are stored for this product. This
+// is used by browser exit code metrics reporting.
+base::string16 GetBrowserExitCodesRegistryPath();
+
+}  // namespace chrome
+
+#endif  // CHROME_COMMON_METRICS_CONSTANTS_UTIL_WIN_H_