Enabling clang::find_bad_constructs for libjingle_peerconnection_api.

This CL removes //build/config/clang:find_bad_constructs from the
suppressed_configs list, which means that clang:find_bad_constructs
is now enabled on these translation units.

Bug: webrtc:9251, webrtc:163
Change-Id: I5475e574353c772910181495fdb3400b5f0e7399
Reviewed-on: https://webrtc-review.googlesource.com/87240
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24040}
diff --git a/api/rtptransceiverinterface.h b/api/rtptransceiverinterface.h
index 26f1fdf..025e8e3 100644
--- a/api/rtptransceiverinterface.h
+++ b/api/rtptransceiverinterface.h
@@ -34,6 +34,8 @@
 // PeerConnectionInterface::AddTransceiver.
 // https://w3c.github.io/webrtc-pc/#dom-rtcrtptransceiverinit
 struct RtpTransceiverInit final {
+  RtpTransceiverInit();
+  ~RtpTransceiverInit();
   // Direction of the RtpTransceiver. See RtpTransceiverInterface::direction().
   RtpTransceiverDirection direction = RtpTransceiverDirection::kSendRecv;
 
@@ -112,9 +114,7 @@
   // OnAddTrack only get fired once even if the same session description is
   // applied again.
   // Exposed in the public interface for use by Chromium.
-  virtual absl::optional<RtpTransceiverDirection> fired_direction() const {
-    return absl::nullopt;
-  }
+  virtual absl::optional<RtpTransceiverDirection> fired_direction() const;
 
   // The Stop method irreversibly stops the RtpTransceiver. The sender of this
   // transceiver will no longer send, the receiver will no longer receive.
@@ -129,7 +129,7 @@
       rtc::ArrayView<RtpCodecCapability> codecs) = 0;
 
  protected:
-  virtual ~RtpTransceiverInterface() = default;
+  ~RtpTransceiverInterface() override = default;
 };
 
 }  // namespace webrtc