Replace left over WebVector use in RTCRtpReceiverImpl

BUG=787254
R=haraken@chromium.org

Change-Id: I5e2b5d72784ba5d7ebe813fe2b1b82043d4e406c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1991410
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#729706}

third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.cc

@@ -2369,7 +2369,7 @@ void RTCPeerConnectionHandler::OnModifyTransceivers(
                                    kSetLocalDescription
                              : PeerConnectionTracker::TransceiverUpdatedReason::
                                    kSetRemoteDescription;
-  blink::WebVector<uintptr_t> ids(transceiver_states.size());
+  Vector<uintptr_t> ids(SafeCast<wtf_size_t>(transceiver_states.size()));
   for (WTF::wtf_size_t i = 0; i < transceiver_states.size(); ++i) {
     // Figure out if this transceiver is new or if setting the state modified
     // the transceiver such that it should be logged by the

third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.h

@@ -378,7 +378,7 @@ class MODULES_EXPORT RTCPeerConnectionHandler
   std::vector<std::unique_ptr<blink::RTCRtpTransceiverImpl>> rtp_transceivers_;
   // A snapshot of transceiver ids taken before the last transition, used to
   // detect any removals during rollback.
-  blink::WebVector<uintptr_t> previous_transceiver_ids_;
+  Vector<uintptr_t> previous_transceiver_ids_;
 
   base::WeakPtr<PeerConnectionTracker> peer_connection_tracker_;