Adding 3 DLLs to the blacklist.

chrome_elf/blacklist/blacklist.cc

Index: chrome_elf/blacklist/blacklist.cc
diff --git a/chrome_elf/blacklist/blacklist.cc b/chrome_elf/blacklist/blacklist.cc
index 8107ffcab39abeaebde41f90c73a90beefc36ac4..5dbfac0cbf57e17254d51a381f034fc541bf45d8 100644
--- a/chrome_elf/blacklist/blacklist.cc
+++ b/chrome_elf/blacklist/blacklist.cc
@@ -39,6 +39,9 @@ const wchar_t* g_troublesome_dlls[kTroublesomeDllsMaxCount] = {
   L"windowsapihookdll32.dll",           // Lenovo One Key Theater.
   L"activedetect64.dll",                // Lenovo One Key Theater.
   L"windowsapihookdll64.dll",           // Lenovo One Key Theater.
+  L"systemk.dll",                       // Unknown (suspected adware).
+  L"bitguard.dll",                      // Unknown (suspected malware).
+  L"chrmxtn.dll",                       // Unknown (keystroke logger).
   // Keep this null pointer here to mark the end of the list.
   NULL,
 };