Reland "Implement Math.random() purely in JavaScript" plus fixes.

src/serialize.cc

 // Copyright 2012 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 279 matching lines @@
   Add(stub_cache->map_reference(StubCache::kSecondary).address(),
       STUB_CACHE_TABLE,
       6,
       "StubCache::secondary_->map");
 
   // Runtime entries
   Add(ExternalReference::perform_gc_function(isolate).address(),
       RUNTIME_ENTRY,
       1,
       "Runtime::PerformGC");
-  Add(ExternalReference::random_uint32_function(isolate).address(),
-      RUNTIME_ENTRY,
-      3,
-      "V8::Random");
   Add(ExternalReference::delete_handle_scope_extensions(isolate).address(),
       RUNTIME_ENTRY,
       4,
       "HandleScope::DeleteExtensions");
   Add(ExternalReference::
           incremental_marking_record_write_function(isolate).address(),
       RUNTIME_ENTRY,
       5,
       "IncrementalMarking::RecordWrite");
   Add(ExternalReference::store_buffer_overflow_function(isolate).address(),
@@ skipping 1551 matching lines @@
 
 bool SnapshotByteSource::AtEOF() {
   if (0u + length_ - position_ > 2 * sizeof(uint32_t)) return false;
   for (int x = position_; x < length_; x++) {
     if (data_[x] != SerializerDeserializer::nop()) return false;
   }
   return true;
 }
 
 } }  // namespace v8::internal