Update some Sk4px APIs.

src/opts/SkNx_neon.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkNx_neon_DEFINED
 #define SkNx_neon_DEFINED
 
@@ skipping 343 matching lines @@
          uint8_t m, uint8_t n, uint8_t o, uint8_t p) {
         fVec = (uint8x16_t) { a,b,c,d, e,f,g,h, i,j,k,l, m,n,o,p };
     }
 
     void store(uint8_t vals[16]) const { vst1q_u8(vals, fVec); }
 
     SkNi saturatedAdd(const SkNi& o) const { return vqaddq_u8(fVec, o.fVec); }
 
     SkNi operator + (const SkNi& o) const { return vaddq_u8(fVec, o.fVec); }
     SkNi operator - (const SkNi& o) const { return vsubq_u8(fVec, o.fVec); }
-    SkNi operator * (const SkNi& o) const { return vmulq_u8(fVec, o.fVec); }
-
-    SkNi operator << (int bits) const { SHIFT8(vshlq_n_u8, fVec, bits); }
-    SkNi operator >> (int bits) const { SHIFT8(vshrq_n_u8, fVec, bits); }
 
     static SkNi Min(const SkNi& a, const SkNi& b) { return vminq_u8(a.fVec, b.fVec); }
 
     template <int k> uint8_t kth() const {
         SkASSERT(0 <= k && k < 15);
         return vgetq_lane_u8(fVec, k&16);
     }
 
     uint8x16_t fVec;
 };
 
 #undef SHIFT32
 #undef SHIFT16
 #undef SHIFT8
 
 }  // namespace
 
 #endif//SkNx_neon_DEFINED