Revert of Cleanup: Remove unneeded SSE2 checks and unused code.

skia/ext/convolver.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_H_
 #define SKIA_EXT_CONVOLVER_H_
 
 #include <cmath>
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/cpu.h"
 #include "third_party/skia/include/core/SkSize.h"
 #include "third_party/skia/include/core/SkTypes.h"
 
 // We can build SSE2 optimized versions for all x86 CPUs
 // except when building for the IOS emulator.
 #if defined(ARCH_CPU_X86_FAMILY) && !defined(OS_IOS)
 #define SIMD_SSE2 1
 #define SIMD_PADDING 8  // 8 * int16
 #endif
 
@@ skipping 203 matching lines @@
 // Set up the |filter| instance with a gaussian kernel. |kernel_sigma| is the
 // parameter of gaussian. If |derivative| is true, the kernel will be that of
 // the first derivative. Intended for use with the two routines above.
 SK_API void SetUpGaussianConvolutionKernel(ConvolutionFilter1D* filter,
                                            float kernel_sigma,
                                            bool derivative);
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_CONVOLVER_H_