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

src/platform-linux.cc

Index: src/platform-linux.cc
diff --git a/src/platform-linux.cc b/src/platform-linux.cc
index 30825d701e261dc5ed198b8e0881f80c55df087f..d0fd77add61b6b01d00200d9cad6527785eecbbe 100644
--- a/src/platform-linux.cc
+++ b/src/platform-linux.cc
@@ -466,12 +466,4 @@ bool VirtualMemory::HasLazyCommits() {
   return true;
 }
 
-
-void OS::SetUp() {
-  // Seed the random number generator. We preserve microsecond resolution.
-  uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis()) ^ (getpid() << 16);
-  srandom(static_cast<unsigned int>(seed));
-}
-
-
 } }  // namespace v8::internal