ubsan shift fixes

tests/RandomTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkRandom.h"
 #include "SkTSort.h"
 #include "Test.h"
@@ skipping 101 matching lines @@
     // pre-seed our string value
     int value = 0;
     for (int i = 0; i < kWordWidth-1; ++i) {
         value <<= 1;
         unsigned int rnd = rand.nextU();
         value |= ((rnd >> shift) & 0x1);
     }
 
     // now make some strings and track them
     for (int i = 0; i < kN; ++i) {
-        value <<= 1;
+        value = SkLeftShift(value, 1);
         unsigned int rnd = rand.nextU();
         value |= ((rnd >> shift) & 0x1);
 
         int index = value & (kNumEntries-1);
         SkASSERT(index < kNumEntries);
         int entry_shift = (value >> (kWordWidth-5)) & 0x1f;
         entries[index] |= (0x1 << entry_shift);
     }
 
     // count entries
@@ skipping 50 matching lines @@
     test_random_byte(reporter, 8);
     test_random_byte(reporter, 16);
     test_random_byte(reporter, 24);
 
     test_random_float(reporter);
 
     test_gorilla(reporter);
 
     test_range(reporter);
 }