Change members's order and combine duplicated method for FFTFrame.

Source/platform/audio/ipp/FFTFrameIPP.cpp

Index: Source/platform/audio/ipp/FFTFrameIPP.cpp
diff --git a/Source/platform/audio/ipp/FFTFrameIPP.cpp b/Source/platform/audio/ipp/FFTFrameIPP.cpp
index 55f4861a22ec4b5de7e7353c65153f77e34f839a..15046d72a726505933cbc4fda07add8fc5ae3c16 100644
--- a/Source/platform/audio/ipp/FFTFrameIPP.cpp
+++ b/Source/platform/audio/ipp/FFTFrameIPP.cpp
@@ -45,9 +45,9 @@ const unsigned maximumFFTPower2Size = 24;
 FFTFrame::FFTFrame(unsigned fftSize)
     : m_FFTSize(fftSize)
     , m_log2FFTSize(static_cast<unsigned>(log2(fftSize)))
-    , m_complexData(fftSize)
     , m_realData(fftSize / 2)
     , m_imagData(fftSize / 2)
+    , m_complexData(fftSize)
 {
     // We only allow power of two.
     ASSERT(1UL << m_log2FFTSize == m_FFTSize);
@@ -70,9 +70,9 @@ FFTFrame::FFTFrame()
 FFTFrame::FFTFrame(const FFTFrame& frame)
     : m_FFTSize(frame.m_FFTSize)
     , m_log2FFTSize(frame.m_log2FFTSize)
-    , m_complexData(frame.m_FFTSize)
     , m_realData(frame.m_FFTSize / 2)
     , m_imagData(frame.m_FFTSize / 2)
+    , m_complexData(frame.m_FFTSize)
 {
     ippsDFTInitAlloc_R_32f(&m_DFTSpec, m_FFTSize, IPP_FFT_NODIV_BY_ANY, ippAlgHintFast);
     int bufferSize = 0;
@@ -124,16 +124,6 @@ void FFTFrame::doInverseFFT(float* data)
     ippsMulC_32f_I(scale, reinterpret_cast<Ipp32f*>(data), m_FFTSize);
 }
 
-float* FFTFrame::realData() const
-{
-    return const_cast<float*>(m_realData.data());
-}
-
-float* FFTFrame::imagData() const
-{
-    return const_cast<float*>(m_imagData.data());
-}
-
 float* FFTFrame::getUpToDateComplexData()
 {
     int len = m_FFTSize >> 1;