Try fixing NaCl V8 compilation failure by initializing interrupt_callback_data_.

src/execution.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 605 matching lines @@
 
 
 void StackGuard::ThreadLocal::Clear() {
   real_jslimit_ = kIllegalLimit;
   jslimit_ = kIllegalLimit;
   real_climit_ = kIllegalLimit;
   climit_ = kIllegalLimit;
   nesting_ = 0;
   postpone_interrupts_nesting_ = 0;
   interrupt_flags_ = 0;
-  interrupt_callback_ = 0;
+  interrupt_callback_ = NULL;
+  interrupt_callback_data_ = NULL;
 }
 
 
 bool StackGuard::ThreadLocal::Initialize(Isolate* isolate) {
   bool should_set_stack_limits = false;
   if (real_climit_ == kIllegalLimit) {
     // Takes the address of the limit variable in order to find out where
     // the top of stack is right now.
     const uintptr_t kLimitSize = FLAG_stack_size * KB;
     uintptr_t limit = reinterpret_cast<uintptr_t>(&limit) - kLimitSize;
     ASSERT(reinterpret_cast<uintptr_t>(&limit) > kLimitSize);
     real_jslimit_ = SimulatorStack::JsLimitFromCLimit(isolate, limit);
     jslimit_ = SimulatorStack::JsLimitFromCLimit(isolate, limit);
     real_climit_ = limit;
     climit_ = limit;
     should_set_stack_limits = true;
   }
   nesting_ = 0;
   postpone_interrupts_nesting_ = 0;
   interrupt_flags_ = 0;
-  interrupt_callback_ = 0;
+  interrupt_callback_ = NULL;
+  interrupt_callback_data_ = NULL;
   return should_set_stack_limits;
 }
 
 
 void StackGuard::ClearThread(const ExecutionAccess& lock) {
   thread_local_.Clear();
   isolate_->heap()->SetStackLimits();
 }
 
 
@@ skipping 357 matching lines @@
     ASSERT(isolate->concurrent_recompilation_enabled());
     stack_guard->Continue(INSTALL_CODE);
     isolate->optimizing_compiler_thread()->InstallOptimizedFunctions();
   }
   isolate->runtime_profiler()->OptimizeNow();
   return isolate->heap()->undefined_value();
 }
 
 
 } }  // namespace v8::internal