Fixing remaining VC++ 2015 64-bit build breaks

sandbox/win/src/interception_unittest.cc

 // Copyright (c) 2011 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.
 
 // This file contains unit tests for InterceptionManager.
 // The tests require private information so the whole interception.cc file is
 // included from this file.
 
 #include <algorithm>
 #include <set>
@@ skipping 75 matching lines @@
 TEST(InterceptionManagerTest, GetGranularAlignedRandomOffset) {
   std::set<size_t> sizes;
 
   // 544 is current value of interceptions_.size() * sizeof(ThunkData) +
   // sizeof(DllInterceptionData).
   const size_t kThunkBytes = 544;
 
   // ciel(log2(544)) = 10.
   // Alignment must be 2^10 = 1024.
   const size_t kAlignmentBits = base::bits::Log2Ceiling(kThunkBytes);
-  const size_t kAlignment = 1 << kAlignmentBits;
+  const size_t kAlignment = static_cast<size_t>(1) << kAlignmentBits;
 
   const size_t kAllocGranularity = 65536;
 
   // Generate enough sample data to ensure there is at least one value in each
   // potential bucket.
   for (size_t i = 0; i < 1000000; i++)
     sizes.insert(internal::GetGranularAlignedRandomOffset(kThunkBytes));
 
   size_t prev_val = 0;
   size_t min_val = kAllocGranularity;
@@ skipping 143 matching lines @@
   int num_dlls, num_functions, num_names;
   WalkBuffer(local_buffer.get(), buffer_size, &num_dlls, &num_functions,
              &num_names);
 
   EXPECT_EQ(3, num_dlls);
   EXPECT_EQ(4, num_functions);
   EXPECT_EQ(0, num_names);
 }
 
 }  // namespace sandbox