ubsan shift fixes

include/core/SkTypes.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkTypes_DEFINED
 #define SkTypes_DEFINED
 
@@ skipping 288 matching lines @@
 static inline bool SkIsS16(long x) {
     return (int16_t)x == x;
 }
 
 /** Returns true if the value can be represented with unsigned 16bits
  */
 static inline bool SkIsU16(long x) {
     return (uint16_t)x == x;
 }
 
+static inline int32_t SkLeftShift(int32_t value, int32_t shift) {
+    return (int32_t) ((uint32_t) value << shift);
+}
+
+static inline int64_t SkLeftShift(int64_t value, int32_t shift) {
+    return (int64_t) ((uint64_t) value << shift);
+}
+
 //////////////////////////////////////////////////////////////////////////////
 
 /** Returns the number of entries in an array (not a pointer) */
 template <typename T, size_t N> char (&SkArrayCountHelper(T (&array)[N]))[N];
 #define SK_ARRAY_COUNT(array) (sizeof(SkArrayCountHelper(array)))
 
 // Can be used to bracket data types that must be dense, e.g. hash keys.
 #if defined(__clang__)  // This should work on GCC too, but GCC diagnostic pop didn't seem to work!
     #define SK_BEGIN_REQUIRE_DENSE _Pragma("GCC diagnostic push") \
                                    _Pragma("GCC diagnostic error \"-Wpadded\"")
@@ skipping 374 matching lines @@
 private:
     void*       fPtr;
     size_t      fSize;  // can be larger than the requested size (see kReuse)
     uint32_t    fStorage[(kSize + 3) >> 2];
 };
 // Can't guard the constructor because it's a template class.
 
 #endif /* C++ */
 
 #endif