Remove use of PRODUCT_STRING_PATH in chrome_elf.

chrome/browser/win/chrome_elf_init.cc

Index: chrome/browser/win/chrome_elf_init.cc
diff --git a/chrome/browser/win/chrome_elf_init.cc b/chrome/browser/win/chrome_elf_init.cc
index 3ae357ea06133f5ce36042d9fab3afe0585ca78d..9d64fc779c6708a8a64eaeb97f7c6c0637a86471 100644
--- a/chrome/browser/win/chrome_elf_init.cc
+++ b/chrome/browser/win/chrome_elf_init.cc
@@ -13,6 +13,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/registry.h"
 #include "chrome/common/chrome_version.h"
+#include "chrome/install_static/install_util.h"
 #include "chrome_elf/blacklist/blacklist.h"
 #include "chrome_elf/chrome_elf_constants.h"
 #include "chrome_elf/dll_hash/dll_hash.h"
@@ -115,16 +116,19 @@ void InitializeChromeElf() {
   // sandbox::MITIGATION_EXTENSION_POINT_DISABLE is set properly in reg.
   // Note: the very existence of this key signals elf to not enable
   // this mitigation on browser next start.
-  base::win::RegKey finch_security_registry_key(
-      HKEY_CURRENT_USER, elf_sec::kRegSecurityFinchPath, KEY_READ);
+  const base::string16 finch_path(install_static::GetRegistryPath().append(
+      elf_sec::kRegSecurityFinchKeyName));
+  base::win::RegKey finch_security_registry_key(HKEY_CURRENT_USER,
+                                                finch_path.c_str(), KEY_READ);
 
   if (base::FeatureList::IsEnabled(features::kWinSboxDisableExtensionPoints)) {
     if (finch_security_registry_key.Valid())
       finch_security_registry_key.DeleteKey(L"");
   } else {
-    if (!finch_security_registry_key.Valid())
-      finch_security_registry_key.Create(
-          HKEY_CURRENT_USER, elf_sec::kRegSecurityFinchPath, KEY_WRITE);
+    if (!finch_security_registry_key.Valid()) {
+      finch_security_registry_key.Create(HKEY_CURRENT_USER, finch_path.c_str(),
+                                         KEY_WRITE);
+    }
   }
 }