Switching to NSS random number generator and adding init method to unittests.

R=jiayl@webrtc.org, sergeuy@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/8259004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5505 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/p2p/base/stunrequest_unittest.cc

@@ -28,6 +28,7 @@
 #include "talk/base/gunit.h"
 #include "talk/base/helpers.h"
 #include "talk/base/logging.h"
+#include "talk/base/ssladapter.h"
 #include "talk/base/timeutils.h"
 #include "talk/p2p/base/stunrequest.h"
 
@@ -37,8 +38,13 @@ class StunRequestTest : public testing::Test,
                         public sigslot::has_slots<> {
  public:
   static void SetUpTestCase() {
-    talk_base::InitRandom(NULL, 0);
+    talk_base::InitializeSSL();
   }
+
+  static void TearDownTestCase() {
+    talk_base::CleanupSSL();
+  }
+
   StunRequestTest()
       : manager_(talk_base::Thread::Current()),
         request_count_(0), response_(NULL),