Change DTLS default from 1.0 to 1.2 for webrtc.

webrtc/p2p/base/dtlstransportchannel_unittest.cc

Index: webrtc/p2p/base/dtlstransportchannel_unittest.cc
diff --git a/webrtc/p2p/base/dtlstransportchannel_unittest.cc b/webrtc/p2p/base/dtlstransportchannel_unittest.cc
index 85203a61346647c81f56c04796d9628b30c8d648..77e0c8bad983dadf77338d14282cb2135c0170f7 100644
--- a/webrtc/p2p/base/dtlstransportchannel_unittest.cc
+++ b/webrtc/p2p/base/dtlstransportchannel_unittest.cc
@@ -48,7 +48,7 @@ class DtlsTestClient : public sigslot::has_slots<> {
       : name_(name),
         packet_size_(0),
         use_dtls_srtp_(false),
-        ssl_max_version_(rtc::SSL_PROTOCOL_DTLS_10),
+        ssl_max_version_(rtc::SSL_PROTOCOL_DTLS_12),
         negotiated_dtls_(false),
         received_dtls_client_hello_(false),
         received_dtls_server_hello_(false) {}
@@ -400,7 +400,7 @@ class DtlsTransportChannelTest : public testing::Test {
         channel_ct_(1),
         use_dtls_(false),
         use_dtls_srtp_(false),
-        ssl_expected_version_(rtc::SSL_PROTOCOL_DTLS_10) {}
+        ssl_expected_version_(rtc::SSL_PROTOCOL_DTLS_12) {}
 
   void SetChannelCount(size_t channel_ct) {
     channel_ct_ = static_cast<int>(channel_ct);