Add Bit Defender Internet Security 64-bit DLL to blacklist.

This blocks the DLL from loading in sandbox processes.  It was causing sandbox
startup failure on Win64.

TBR=jschuh@chromium.org
BUG=379730

Review URL: https://codereview.chromium.org/308993003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274319 0039d316-1c4b-4281-b951-d872f2087c98

content/common/sandbox_win.cc

@@ -45,6 +45,7 @@ const wchar_t* const kTroublesomeDlls[] = {
   L"adialhk.dll",                 // Kaspersky Internet Security.
   L"acpiz.dll",                   // Unknown.
   L"akinsofthook32.dll",          // Akinsoft Software Engineering.
+  L"avcuf64.dll",                 // Bit Defender Internet Security x64.
   L"avgrsstx.dll",                // AVG 8.
   L"babylonchromepi.dll",         // Babylon translator.
   L"btkeyind.dll",                // Widcomm Bluetooth.