Revert 17963, 17962 and 17955: Random number generator in JS changes

src/v8.h

 // 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 78 matching lines @@
                                       bool take_snapshot = false);
 
   // Allows an entropy source to be provided for use in random number
   // generation.
   static void SetEntropySource(EntropySource source);
   // Support for return-address rewriting profilers.
   static void SetReturnAddressLocationResolver(
       ReturnAddressLocationResolver resolver);
   // Support for entry hooking JITed code.
   static void SetFunctionEntryHook(FunctionEntryHook entry_hook);
+  // Random number generation support. Not cryptographically safe.
+  static uint32_t Random(Context* context);
 
   static void AddCallCompletedCallback(CallCompletedCallback callback);
   static void RemoveCallCompletedCallback(CallCompletedCallback callback);
   static void FireCallCompletedCallback(Isolate* isolate);
 
   static v8::ArrayBuffer::Allocator* ArrayBufferAllocator() {
     return array_buffer_allocator_;
   }
 
   static void SetArrayBufferAllocator(v8::ArrayBuffer::Allocator *allocator) {
@@ skipping 20 matching lines @@
 
 // JavaScript defines two kinds of 'nil'.
 enum NilValue { kNullValue, kUndefinedValue };
 
 
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_V8_H_