enable SSE2 in skia/convolver for linux32

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);
+}  // namespace skia
+
+#endif  // SKIA_EXT_CONVOLVER_SSE2_H_