Remove USE(GSTREAMER) and USE(WEBAUDIO_GSTREAMER) guards.

Source/core/platform/audio/HRTFElevation.cpp

Index: Source/core/platform/audio/HRTFElevation.cpp
diff --git a/Source/core/platform/audio/HRTFElevation.cpp b/Source/core/platform/audio/HRTFElevation.cpp
index c3faba6f4340d4d1cc0ae68b5c8b5647e2153b5b..4278891593ebb2855ede7bf6e625ce3cd7481994 100644
--- a/Source/core/platform/audio/HRTFElevation.cpp
+++ b/Source/core/platform/audio/HRTFElevation.cpp
@@ -62,44 +62,6 @@ const size_t ResponseFrameSize = 256;
 // The impulse responses may be resampled to a different sample-rate (depending on the audio hardware) when they are loaded.
 const float ResponseSampleRate = 44100;
 
-#if USE(WEBAUDIO_GSTREAMER)
-#define USE_CONCATENATED_IMPULSE_RESPONSES
-#endif
-
-#ifdef USE_CONCATENATED_IMPULSE_RESPONSES
-// Lazily load a concatenated HRTF database for given subject and store it in a
-// local hash table to ensure quick efficient future retrievals.
-static AudioBus* getConcatenatedImpulseResponsesForSubject(const String& subjectName)
-{
-    typedef HashMap<String, AudioBus*> AudioBusMap;
-    DEFINE_STATIC_LOCAL(AudioBusMap, audioBusMap, ());
-
-    AudioBus* bus;
-    AudioBusMap::iterator iterator = audioBusMap.find(subjectName);
-    if (iterator == audioBusMap.end()) {
-        OwnPtr<AudioBus> concatenatedImpulseResponses = AudioBus::loadPlatformResource(subjectName.utf8().data(), ResponseSampleRate);
-        ASSERT(concatenatedImpulseResponses);
-        if (!concatenatedImpulseResponses)
-            return 0;
-
-        bus = concatenatedImpulseResponses.leakPtr();
-        audioBusMap.set(subjectName, bus);
-    } else
-        bus = iterator->value;
-
-    size_t responseLength = bus->length();
-    size_t expectedLength = static_cast<size_t>(TotalNumberOfResponses * ResponseFrameSize);
-
-    // Check number of channels and length. For now these are fixed and known.
-    bool isBusGood = responseLength == expectedLength && bus->numberOfChannels() == 2;
-    ASSERT(isBusGood);
-    if (!isBusGood)
-        return 0;
-
-    return bus;
-}
-#endif
-
 // Takes advantage of the symmetry and creates a composite version of the two measured versions.  For example, we have both azimuth 30 and -30 degrees
 // where the roles of left and right ears are reversed with respect to each other.
 bool HRTFElevation::calculateSymmetricKernelsForAzimuthElevation(int azimuth, int elevation, float sampleRate, const String& subjectName,
@@ -149,36 +111,6 @@ bool HRTFElevation::calculateKernelsForAzimuthElevation(int azimuth, int elevati
     // It's passed in as an internal ASCII identifier and is an implementation detail.
     int positiveElevation = elevation < 0 ? elevation + 360 : elevation;
 
-#ifdef USE_CONCATENATED_IMPULSE_RESPONSES
-    AudioBus* bus(getConcatenatedImpulseResponsesForSubject(subjectName));
-
-    if (!bus)
-        return false;
-
-    int elevationIndex = positiveElevation / AzimuthSpacing;
-    if (positiveElevation > 90)
-        elevationIndex -= AzimuthSpacing;
-
-    // The concatenated impulse response is a bus containing all
-    // the elevations per azimuth, for all azimuths by increasing
-    // order. So for a given azimuth and elevation we need to compute
-    // the index of the wanted audio frames in the concatenated table.
-    unsigned index = ((azimuth / AzimuthSpacing) * HRTFDatabase::NumberOfRawElevations) + elevationIndex;
-    bool isIndexGood = index < TotalNumberOfResponses;
-    ASSERT(isIndexGood);
-    if (!isIndexGood)
-        return false;
-
-    // Extract the individual impulse response from the concatenated
-    // responses and potentially sample-rate convert it to the desired
-    // (hardware) sample-rate.
-    unsigned startFrame = index * ResponseFrameSize;
-    unsigned stopFrame = startFrame + ResponseFrameSize;
-    OwnPtr<AudioBus> preSampleRateConvertedResponse = AudioBus::createBufferFromRange(bus, startFrame, stopFrame);
-    OwnPtr<AudioBus> response = AudioBus::createBySampleRateConverting(preSampleRateConvertedResponse.get(), false, sampleRate);
-    AudioChannel* leftEarImpulseResponse = response->channel(AudioBus::ChannelLeft);
-    AudioChannel* rightEarImpulseResponse = response->channel(AudioBus::ChannelRight);
-#else
     String resourceName = String::format("IRC_%s_C_R0195_T%03d_P%03d", subjectName.utf8().data(), azimuth, positiveElevation);
 
     OwnPtr<AudioBus> impulseResponse(AudioBus::loadPlatformResource(resourceName.utf8().data(), sampleRate));
@@ -198,7 +130,6 @@ bool HRTFElevation::calculateKernelsForAzimuthElevation(int azimuth, int elevati
     
     AudioChannel* leftEarImpulseResponse = impulseResponse->channelByType(AudioBus::ChannelLeft);
     AudioChannel* rightEarImpulseResponse = impulseResponse->channelByType(AudioBus::ChannelRight);
-#endif
 
     // Note that depending on the fftSize returned by the panner, we may be truncating the impulse response we just loaded in.
     const size_t fftSize = HRTFPanner::fftSizeForSampleRate(sampleRate);