Return a copy of the supported RTP header extensions instead of a reference.

talk/media/webrtc/webrtcvideoengine2_unittest.cc

Index: talk/media/webrtc/webrtcvideoengine2_unittest.cc
diff --git a/talk/media/webrtc/webrtcvideoengine2_unittest.cc b/talk/media/webrtc/webrtcvideoengine2_unittest.cc
index 832c4d06233a71c40c6c1749eb9f88e626554095..cfa24cee54cddf7cccb262bdad8ed43c3782ad6a 100644
--- a/talk/media/webrtc/webrtcvideoengine2_unittest.cc
+++ b/talk/media/webrtc/webrtcvideoengine2_unittest.cc
@@ -242,7 +242,8 @@ TEST_F(WebRtcVideoEngine2Test, DefaultRtxCodecHasAssociatedPayloadTypeSet) {
 }
 
 TEST_F(WebRtcVideoEngine2Test, SupportsTimestampOffsetHeaderExtension) {
-  std::vector<RtpHeaderExtension> extensions = engine_.rtp_header_extensions();
+  std::vector<RtpHeaderExtension> extensions =
+      engine_.SupportedRtpHeaderExtensions();
   ASSERT_FALSE(extensions.empty());
   for (size_t i = 0; i < extensions.size(); ++i) {
     if (extensions[i].uri == kRtpTimestampOffsetHeaderExtension) {
@@ -254,7 +255,8 @@ TEST_F(WebRtcVideoEngine2Test, SupportsTimestampOffsetHeaderExtension) {
 }
 
 TEST_F(WebRtcVideoEngine2Test, SupportsAbsoluteSenderTimeHeaderExtension) {
-  std::vector<RtpHeaderExtension> extensions = engine_.rtp_header_extensions();
+  std::vector<RtpHeaderExtension> extensions =
+      engine_.SupportedRtpHeaderExtensions();
   ASSERT_FALSE(extensions.empty());
   for (size_t i = 0; i < extensions.size(); ++i) {
     if (extensions[i].uri == kRtpAbsoluteSenderTimeHeaderExtension) {
@@ -274,7 +276,8 @@ class WebRtcVideoEngine2WithSendSideBweTest : public WebRtcVideoEngine2Test {
 
 TEST_F(WebRtcVideoEngine2WithSendSideBweTest,
        SupportsTransportSequenceNumberHeaderExtension) {
-  std::vector<RtpHeaderExtension> extensions = engine_.rtp_header_extensions();
+  std::vector<RtpHeaderExtension> extensions =
+      engine_.SupportedRtpHeaderExtensions();
   ASSERT_FALSE(extensions.empty());
   for (size_t i = 0; i < extensions.size(); ++i) {
     if (extensions[i].uri == kRtpTransportSequenceNumberHeaderExtension) {
@@ -287,7 +290,8 @@ TEST_F(WebRtcVideoEngine2WithSendSideBweTest,
 }
 
 TEST_F(WebRtcVideoEngine2Test, SupportsVideoRotationHeaderExtension) {
-  std::vector<RtpHeaderExtension> extensions = engine_.rtp_header_extensions();
+  std::vector<RtpHeaderExtension> extensions =
+      engine_.SupportedRtpHeaderExtensions();
   ASSERT_FALSE(extensions.empty());
   for (size_t i = 0; i < extensions.size(); ++i) {
     if (extensions[i].uri == kRtpVideoRotationHeaderExtension) {