Make PRODUCT_STRING_PATH accessible via chrome_constants.h

chrome/common/chrome_constants.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.
 
 // A handful of resource-like constants related to the Chrome application.
 
 #ifndef CHROME_COMMON_CHROME_CONSTANTS_H_
 #define CHROME_COMMON_CHROME_CONSTANTS_H_
 
 #include "base/files/file_path.h"
 
+#if defined(OS_WIN)
+#if defined(GOOGLE_CHROME_BUILD)
+#define PRODUCT_STRING_PATH L"Google\\Chrome"
+#elif defined(CHROMIUM_BUILD)
+#define PRODUCT_STRING_PATH L"Chromium"
+#else
+#error Unknown branding
+#endif
+#endif  // defined(OS_WIN)
+
 namespace chrome {
 
 extern const char kChromeVersion[];
 
 extern const char kChromeVersionEnvVar[];
 
 extern const base::FilePath::CharType kBrowserProcessExecutableName[];
 extern const base::FilePath::CharType kHelperProcessExecutableName[];
 extern const base::FilePath::CharType kBrowserProcessExecutablePath[];
 extern const base::FilePath::CharType kHelperProcessExecutablePath[];
@@ skipping 136 matching lines @@
 extern const char kApplicationClientIDStringForAVScanning[];
 
 #if defined(OS_ANDROID)
 // The largest reasonable length we'd assume for a meta tag attribute.
 extern const size_t kMaxMetaTagAttributeLength;
 #endif
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_CHROME_CONSTANTS_H_