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

src/objects-inl.h

 // 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 5441 matching lines @@
 bool JSArrayBuffer::is_external() {
   return BooleanBit::get(flag(), kIsExternalBit);
 }
 
 
 void JSArrayBuffer::set_is_external(bool value) {
   set_flag(BooleanBit::set(flag(), kIsExternalBit, value));
 }
 
 
+bool JSArrayBuffer::should_be_freed() {
+  return BooleanBit::get(flag(), kShouldBeFreed);
+}
+
+
+void JSArrayBuffer::set_should_be_freed(bool value) {
+  set_flag(BooleanBit::set(flag(), kShouldBeFreed, value));
+}
+
+
 ACCESSORS(JSArrayBuffer, weak_next, Object, kWeakNextOffset)
 ACCESSORS(JSArrayBuffer, weak_first_view, Object, kWeakFirstViewOffset)
 
 
 ACCESSORS(JSArrayBufferView, buffer, Object, kBufferOffset)
 ACCESSORS(JSArrayBufferView, byte_offset, Object, kByteOffsetOffset)
 ACCESSORS(JSArrayBufferView, byte_length, Object, kByteLengthOffset)
 ACCESSORS(JSArrayBufferView, weak_next, Object, kWeakNextOffset)
 ACCESSORS(JSTypedArray, length, Object, kLengthOffset)
 
@@ skipping 942 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_