Fix Chromium clang plugin warnings

This adds a new file, webrtc/modules/audio_coding/neteq/tools/packet_source.cc, so that I'll have somewhere to put the new non-inlined methods.

NOTRY=true
BUG=webrtc:163

Review-Url: https://codereview.webrtc.org/2290593002
Cr-Commit-Position: refs/heads/master@{#13956}
diff --git a/webrtc/modules/audio_coding/neteq/neteq.gypi b/webrtc/modules/audio_coding/neteq/neteq.gypi
index f43a261..d9c152e 100644
--- a/webrtc/modules/audio_coding/neteq/neteq.gypi
+++ b/webrtc/modules/audio_coding/neteq/neteq.gypi
@@ -246,6 +246,7 @@
             'tools/output_wav_file.h',
             'tools/packet.cc',
             'tools/packet.h',
+            'tools/packet_source.cc',
             'tools/packet_source.h',
             'tools/resample_input_audio_file.cc',
             'tools/resample_input_audio_file.h',
diff --git a/webrtc/modules/audio_coding/neteq/tools/packet.cc b/webrtc/modules/audio_coding/neteq/tools/packet.cc
index a31d080..0ed1be1 100644
--- a/webrtc/modules/audio_coding/neteq/tools/packet.cc
+++ b/webrtc/modules/audio_coding/neteq/tools/packet.cc
@@ -77,6 +77,8 @@
   valid_header_ = ParseHeader(*parser);
 }
 
+Packet::~Packet() = default;
+
 bool Packet::ExtractRedHeaders(std::list<RTPHeader*>* headers) const {
   //
   //  0                   1                    2                   3
diff --git a/webrtc/modules/audio_coding/neteq/tools/packet.h b/webrtc/modules/audio_coding/neteq/tools/packet.h
index 86eedc0..d150805 100644
--- a/webrtc/modules/audio_coding/neteq/tools/packet.h
+++ b/webrtc/modules/audio_coding/neteq/tools/packet.h
@@ -62,7 +62,7 @@
          size_t virtual_packet_length_bytes,
          double time_ms);
 
-  virtual ~Packet() {}
+  virtual ~Packet();
 
   // Parses the first bytes of the RTP payload, interpreting them as RED headers
   // according to RFC 2198. The headers will be inserted into |headers|. The
diff --git a/webrtc/modules/audio_coding/neteq/tools/packet_source.cc b/webrtc/modules/audio_coding/neteq/tools/packet_source.cc
new file mode 100644
index 0000000..d6cb37e
--- /dev/null
+++ b/webrtc/modules/audio_coding/neteq/tools/packet_source.cc
@@ -0,0 +1,30 @@
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/modules/audio_coding/neteq/tools/packet_source.h"
+
+namespace webrtc {
+namespace test {
+
+PacketSource::PacketSource() : use_ssrc_filter_(false), ssrc_(0) {}
+
+PacketSource::~PacketSource() = default;
+
+void PacketSource::FilterOutPayloadType(uint8_t payload_type) {
+  filter_.set(payload_type, true);
+}
+
+void PacketSource::SelectSsrc(uint32_t ssrc) {
+  use_ssrc_filter_ = true;
+  ssrc_ = ssrc;
+}
+
+}  // namespace test
+}  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/neteq/tools/packet_source.h b/webrtc/modules/audio_coding/neteq/tools/packet_source.h
index 3ec576d..caae4ae 100644
--- a/webrtc/modules/audio_coding/neteq/tools/packet_source.h
+++ b/webrtc/modules/audio_coding/neteq/tools/packet_source.h
@@ -24,21 +24,16 @@
 // Interface class for an object delivering RTP packets to test applications.
 class PacketSource {
  public:
-  PacketSource() : use_ssrc_filter_(false), ssrc_(0) {}
-  virtual ~PacketSource() {}
+  PacketSource();
+  virtual ~PacketSource();
 
   // Returns next packet. Returns nullptr if the source is depleted, or if an
   // error occurred.
   virtual std::unique_ptr<Packet> NextPacket() = 0;
 
-  virtual void FilterOutPayloadType(uint8_t payload_type) {
-    filter_.set(payload_type, true);
-  }
+  virtual void FilterOutPayloadType(uint8_t payload_type);
 
-  virtual void SelectSsrc(uint32_t ssrc) {
-    use_ssrc_filter_ = true;
-    ssrc_ = ssrc;
-  }
+  virtual void SelectSsrc(uint32_t ssrc);
 
  protected:
   std::bitset<128> filter_;  // Payload type is 7 bits in the RFC.