Adding RTCErrorOr class to be used by ORTC APIs.

webrtc/pc/peerconnectioninterface_unittest.cc

Index: webrtc/pc/peerconnectioninterface_unittest.cc
diff --git a/webrtc/pc/peerconnectioninterface_unittest.cc b/webrtc/pc/peerconnectioninterface_unittest.cc
index 7f73db843222dbd087a4e2622019fe63d39109ad..8a80e5e90793a61605af899c1dfa73c11286475e 100644
--- a/webrtc/pc/peerconnectioninterface_unittest.cc
+++ b/webrtc/pc/peerconnectioninterface_unittest.cc
@@ -3384,14 +3384,6 @@ TEST(CreateSessionOptionsTest, MediaConstraintsInAnswer) {
   EXPECT_TRUE(updated_answer_options.has_video());
 }
 
-TEST(RTCErrorTypeTest, OstreamOperator) {
-  std::ostringstream oss;
-  oss << webrtc::RTCErrorType::NONE << ' '
-      << webrtc::RTCErrorType::INVALID_PARAMETER << ' '
-      << webrtc::RTCErrorType::INTERNAL_ERROR;
-  EXPECT_EQ("NONE INVALID_PARAMETER INTERNAL_ERROR", oss.str());
-}
-
 // Tests a few random fields being different.
 TEST(RTCConfigurationTest, ComparisonOperators) {
   PeerConnectionInterface::RTCConfiguration a;