Fix presubmit error.

src/platform-macos.cc

 // Copyright 2006-2008 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 495 matching lines @@
         thread_state_flavor_t flavor = x86_THREAD_STATE64;
         x86_thread_state64_t state;
         mach_msg_type_number_t count = x86_THREAD_STATE64_COUNT;
 #elif V8_HOST_ARCH_IA32
         thread_state_flavor_t flavor = i386_THREAD_STATE;
         i386_thread_state_t state;
         mach_msg_type_number_t count = i386_THREAD_STATE_COUNT;
 #else
 #error Unsupported Mac OS X host architecture.
 #endif  // V8_TARGET_ARCH_IA32
-        if (KERN_SUCCESS == thread_get_state(profiled_thread_,
-                                             flavor,
-                                             (natural_t*)&state,
-                                             &count)) {
+        if (thread_get_state(profiled_thread_,
+                             flavor,
+                             reinterpret_cast<natural_t*>(&state),
+                             &count) == KERN_SUCCESS) {
 #if V8_HOST_ARCH_X64
           UNIMPLEMENTED();
           sample.pc = 0;
           sample.sp = 0;
           sample.fp = 0;
 #elif V8_HOST_ARCH_IA32
 #if __DARWIN_UNIX03
           sample.pc = state.__eip;
           sample.sp = state.__esp;
           sample.fp = state.__ebp;
@@ skipping 75 matching lines @@
 
   // Deallocate Mach port for thread.
   if (IsProfiling()) {
     mach_port_deallocate(data_->task_self_, data_->profiled_thread_);
   }
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal