Introduce a RandonNumberGenerator class. Refactor the random/private_random uses in Isolate/Context.

test/cctest/test-utils.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
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@@ skipping 122 matching lines @@
       printf("diff at offset %d (%p): is %d, should be %d\n",
              i, reinterpret_cast<void*>(area2 + i), area2[i], area3[i]);
     }
     CHECK(false);
   }
 }
 
 
 TEST(MemMove) {
   v8::V8::Initialize();
-  OS::SetUp();
   byte* area1 = new byte[kAreaSize];
   byte* area2 = new byte[kAreaSize];
   byte* area3 = new byte[kAreaSize];
 
   static const int kMinOffset = 32;
   static const int kMaxOffset = 64;
   static const int kMaxLength = 128;
   STATIC_ASSERT(kMaxOffset + kMaxLength < kAreaSize);
 
   for (int src_offset = kMinOffset; src_offset <= kMaxOffset; src_offset++) {
@@ skipping 73 matching lines @@
 TEST(SequenceCollectorRegression) {
   SequenceCollector<char> collector(16);
   collector.StartSequence();
   collector.Add('0');
   collector.AddBlock(
       i::Vector<const char>("12345678901234567890123456789012", 32));
   i::Vector<char> seq = collector.EndSequence();
   CHECK_EQ(0, strncmp("0123456789012345678901234567890123",
                       seq.start(), seq.length()));
 }