Remove chromium clang style errors affecting sdk/android/media_jni

Bug: webrtc:163
Change-Id: I1e98174817ca032ee13f9a6a386803382843389d
Reviewed-on: https://webrtc-review.googlesource.com/67360
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Paulina Hensman <phensman@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22796}
diff --git a/media/base/streamparams.cc b/media/base/streamparams.cc
index 2efa0d0..ac09bfb 100644
--- a/media/base/streamparams.cc
+++ b/media/base/streamparams.cc
@@ -38,6 +38,9 @@
   return found != nullptr;
 }
 
+MediaStreams::MediaStreams() = default;
+MediaStreams::~MediaStreams() = default;
+
 bool MediaStreams::GetAudioStream(
     const StreamSelector& selector, StreamParams* stream) {
   return GetStream(audio_, selector, stream);
@@ -100,6 +103,16 @@
   return ost.str();
 }
 
+SsrcGroup::SsrcGroup(const std::string& usage,
+                     const std::vector<uint32_t>& ssrcs)
+    : semantics(usage), ssrcs(ssrcs) {}
+SsrcGroup::SsrcGroup(const SsrcGroup&) = default;
+SsrcGroup::SsrcGroup(SsrcGroup&&) = default;
+SsrcGroup::~SsrcGroup() = default;
+
+SsrcGroup& SsrcGroup::operator=(const SsrcGroup&) = default;
+SsrcGroup& SsrcGroup::operator=(SsrcGroup&&) = default;
+
 bool SsrcGroup::has_semantics(const std::string& semantics_in) const {
   return (semantics == semantics_in && ssrcs.size() > 0);
 }
@@ -113,6 +126,13 @@
   return ost.str();
 }
 
+StreamParams::StreamParams() = default;
+StreamParams::StreamParams(const StreamParams&) = default;
+StreamParams::StreamParams(StreamParams&&) = default;
+StreamParams::~StreamParams() = default;
+StreamParams& StreamParams::operator=(const StreamParams&) = default;
+StreamParams& StreamParams::operator=(StreamParams&&) = default;
+
 std::string StreamParams::ToString() const {
   std::ostringstream ost;
   ost << "{";