Revert of purge nss files and dependencies

webrtc/build/sanitizers/lsan_suppressions_webrtc.cc

Index: webrtc/build/sanitizers/lsan_suppressions_webrtc.cc
diff --git a/webrtc/build/sanitizers/lsan_suppressions_webrtc.cc b/webrtc/build/sanitizers/lsan_suppressions_webrtc.cc
index 61fdbbc20b382f85f08c07be98c688b17ac86702..6d19a34881c3d11e76e3120e4ec8fb0ae9d05331 100644
--- a/webrtc/build/sanitizers/lsan_suppressions_webrtc.cc
+++ b/webrtc/build/sanitizers/lsan_suppressions_webrtc.cc
@@ -30,6 +30,23 @@
 
 // Leaks in Nvidia's libGL.
 "leak:libGL.so\n"
+
+// TODO(earthdok): revisit NSS suppressions after the switch to BoringSSL
+// NSS leaks in CertDatabaseNSSTest tests. http://crbug.com/51988
+"leak:net::NSSCertDatabase::ImportFromPKCS12\n"
+"leak:net::NSSCertDatabase::ListCerts\n"
+"leak:net::NSSCertDatabase::DeleteCertAndKey\n"
+"leak:crypto::ScopedTestNSSDB::ScopedTestNSSDB\n"
+// Another leak due to not shutting down NSS properly. http://crbug.com/124445
+"leak:error_get_my_stack\n"
+// The NSS suppressions above will not fire when the fast stack unwinder is
+// used, because it can't unwind through NSS libraries. Apply blanket
+// suppressions for now.
+"leak:libnssutil3\n"
+"leak:libnspr4\n"
+"leak:libnss3\n"
+"leak:libplds4\n"
+"leak:libnssckbi\n"
 
 // XRandR has several one time leaks.
 "leak:libxrandr\n"