Let first packet through to avoid getting key frame requests (and no nacks) for EndToEndTest.ReceivedFecPacketsNotNacked.

BUG=4328
R=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/38259004

Cr-Commit-Position: refs/heads/master@{#8502}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8502 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/video/end_to_end_tests.cc

@@ -565,7 +565,7 @@ void EndToEndTest::TestReceivedFecPacketsNotNacked(
    public:
     explicit FecNackObserver(const FakeNetworkPipe::Config& config)
         : EndToEndTest(kDefaultTimeoutMs, config),
-          state_(kDropEveryOtherPacketUntilFec),
+          state_(kFirstPacket),
           fec_sequence_number_(0),
           has_last_sequence_number_(false),
           last_sequence_number_(0) {}
@@ -592,6 +592,9 @@ void EndToEndTest::TestReceivedFecPacketsNotNacked(
 
       bool fec_packet = encapsulated_payload_type == kUlpfecPayloadType;
       switch (state_) {
+        case kFirstPacket:
+          state_ = kDropEveryOtherPacketUntilFec;
+          break;
         case kDropEveryOtherPacketUntilFec:
           if (fec_packet) {
             state_ = kDropAllMediaPacketsUntilFec;
@@ -649,6 +652,7 @@ void EndToEndTest::TestReceivedFecPacketsNotNacked(
     }
 
     enum {
+      kFirstPacket,
       kDropEveryOtherPacketUntilFec,
       kDropAllMediaPacketsUntilFec,
       kVerifyFecPacketNotInNackList,