PowerPC is not supported by blink

Source/core/platform/audio/DirectConvolver.cpp

 /*
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 72 matching lines @@
 
     vadd(outputBuffer, 1, overlayBuffer, 1, destP, 1, framesToProcess);
     memcpy(overlayBuffer, outputBuffer + m_inputBlockSize, sizeof(float) * kernelSize);
 #else
     float* inputP = m_buffer.data() + m_inputBlockSize;
 
     // Copy samples to 2nd half of input buffer.
     memcpy(inputP, sourceP, sizeof(float) * framesToProcess);
 
 #if OS(MACOSX)
-#if defined(__ppc__) || defined(__i386__)
+#if defined(__i386__)
     conv(inputP - kernelSize + 1, 1, kernelP + kernelSize - 1, -1, destP, 1, framesToProcess, kernelSize);
 #else
     vDSP_conv(inputP - kernelSize + 1, 1, kernelP + kernelSize - 1, -1, destP, 1, framesToProcess, kernelSize);
-#endif // defined(__ppc__) || defined(__i386__)
+#endif // defined(__i386__)
 #else
     // FIXME: The macro can be further optimized to avoid pipeline stalls. One possibility is to maintain 4 separate sums and change the macro to CONVOLVE_FOUR_SAMPLES.
 #define CONVOLVE_ONE_SAMPLE             \
     sum += inputP[i - j] * kernelP[j];  \
     j++;
 
     size_t i = 0;
     while (i < framesToProcess) {
         size_t j = 0;
         float sum = 0;
@@ skipping 268 matching lines @@
 {
     m_buffer.zero();
 #if USE(WEBAUDIO_IPP)
     m_overlayBuffer.zero();
 #endif // USE(WEBAUDIO_IPP)
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)