Added return due to gcc complaints in r1604.

TBR=andrew

TEST=Bulid with clang version 3.1 (trunk 148911) and gcc.

Review URL: https://webrtc-codereview.appspot.com/384004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1606 4adac7df-926f-26a2-2b94-8c16560cd09d

src/common_video/libyuv/libyuv.cc

@@ -230,6 +230,8 @@ libyuv::RotationMode ConvertRotationMode(VideoRotationMode rotation) {
     case kRotate270:
       return libyuv::kRotate270;
   }
+  assert(false);
+  return libyuv::kRotate0;
 }
 
 int ConvertVideoType(VideoType video_type) {
@@ -266,6 +268,8 @@ int ConvertVideoType(VideoType video_type) {
     case kBGRA:
       return libyuv::FOURCC_BGRA;
   }
+  assert(false);
+  return libyuv::FOURCC_ANY;
 }
 
 int ConvertToI420(VideoType src_video_type,

src/modules/audio_processing/echo_cancellation_impl.cc

@@ -33,6 +33,8 @@ WebRtc_Word16 MapSetting(EchoCancellation::SuppressionLevel level) {
     case EchoCancellation::kHighSuppression:
       return kAecNlpAggressive;
   }
+  assert(false);
+  return -1;
 }
 
 int MapError(int err) {

src/modules/audio_processing/echo_control_mobile_impl.cc

@@ -37,6 +37,8 @@ WebRtc_Word16 MapSetting(EchoControlMobile::RoutingMode mode) {
     case EchoControlMobile::kLoudSpeakerphone:
       return 4;
   }
+  assert(false);
+  return -1;
 }
 
 int MapError(int err) {

src/modules/audio_processing/gain_control_impl.cc

@@ -48,6 +48,8 @@ WebRtc_Word16 MapSetting(GainControl::Mode mode) {
       return kAgcModeFixedDigital;
       break;
   }
+  assert(false);
+  return -1;
 }
 }  // namespace
 

src/modules/rtp_rtcp/source/rtp_rtcp_impl.cc

@@ -2258,6 +2258,8 @@ WebRtc_Word32 ModuleRtpRtcpImpl::RequestKeyFrame(const FrameType frameType) {
             return _rtcpSender.SendRTCP(kRtcpFir, 0, NULL, RTT);
         }
     }
+    assert(false);
+    return -1;
 }
 
 WebRtc_Word32 ModuleRtpRtcpImpl::SendRTCPSliceLossIndication(

src/modules/utility/source/file_player_impl.cc

@@ -49,6 +49,8 @@ FilePlayer* FilePlayer::CreateFilePlayer(WebRtc_UWord32 instanceID,
         return NULL;
 #endif
     }
+    assert(false);
+    return NULL;
 }
 
 void FilePlayer::DestroyFilePlayer(FilePlayer* player)

src/modules/utility/source/file_recorder_impl.cc

@@ -51,6 +51,8 @@ FileRecorder* FileRecorder::CreateFileRecorder(WebRtc_UWord32 instanceID,
         return NULL;
 #endif
     }
+    assert(false);
+    return NULL;
 }
 
 void FileRecorder::DestroyFileRecorder(FileRecorder* recorder)

src/system_wrappers/source/sort.cc

@@ -542,6 +542,8 @@ namespace webrtc
         case TYPE_Float64:
             return StdKeySort<double>(data, key, numOfElements, sizeOfElement);
         }
+        assert(false);
+        return -1;
 #endif
     }
 } // namespace webrtc

src/video_engine/test/auto_test/primitives/framedrop_primitives.cc

@@ -264,8 +264,6 @@ void FrameDropDetector::ReportFrameState(State state, unsigned int timestamp) {
       rendered_frames_[timestamp] = webrtc::TickTime::MicrosecondTimestamp();
       num_rendered_frames_++;
       break;
-    default:
-      assert(false);
   }
 }
 

src/video_engine/vie_rtp_rtcp_impl.cc

@@ -36,6 +36,8 @@ static RTCPMethod ViERTCPModeToRTCPMethod(ViERTCPMode api_mode) {
     case kRtcpNonCompound_RFC5506:
       return kRtcpNonCompound;
   }
+  assert(false);
+  return kRtcpOff;
 }
 
 static ViERTCPMode RTCPMethodToViERTCPMode(RTCPMethod module_method) {
@@ -49,6 +51,8 @@ static ViERTCPMode RTCPMethodToViERTCPMode(RTCPMethod module_method) {
     case kRtcpNonCompound:
       return kRtcpNonCompound_RFC5506;
   }
+  assert(false);
+  return kRtcpNone;
 }
 
 static KeyFrameRequestMethod APIRequestToModuleRequest(
@@ -66,6 +70,8 @@ static KeyFrameRequestMethod APIRequestToModuleRequest(
     case kViEKeyFrameRequestFirRtcp:
       return kKeyFrameReqFirRtcp;
   }
+  assert(false);
+  return kKeyFrameReqFirRtp;
 }
 
 ViERTP_RTCP* ViERTP_RTCP::GetInterface(VideoEngine* video_engine) {