[MIPS] Added MIPS DSPr2 optimization for BGRAConvolve2D routine

skia/ext/convolver_SSE2.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SKIA_EXT_CONVOLVER_SSE2_H_
 #define SKIA_EXT_CONVOLVER_SSE2_H_
 
 #include "skia/ext/convolver.h"
 
 namespace skia {
 
 void ConvolveVertically_SSE2(const ConvolutionFilter1D::Fixed* filter_values,
                              int filter_length,
                              unsigned char* const* source_data_rows,
                              int pixel_width,
                              unsigned char* out_row,
                              bool has_alpha);
 void Convolve4RowsHorizontally_SSE2(const unsigned char* src_data[4],
                                     const ConvolutionFilter1D& filter,
                                     unsigned char* out_row[4]);
 void ConvolveHorizontally_SSE2(const unsigned char* src_data,
                                const ConvolutionFilter1D& filter,
-                               unsigned char* out_row);
+                               unsigned char* out_row,
+                               bool has_alpha);
 }  // namespace skia
 
 #endif  // SKIA_EXT_CONVOLVER_SSE2_H_