Split nested namespaces declaration in two lines in accordance with C++ Style Guide.

src/arm/simulator-arm.cc

 // Copyright 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 18 matching lines @@
 
 #include "v8.h"
 
 #include "disasm.h"
 #include "arm/constants-arm.h"
 #include "arm/simulator-arm.h"
 
 #if !defined(__arm__)
 
 // Only build the simulator if not compiling for real ARM hardware.
-namespace assembler { namespace arm {
+namespace assembler {
+namespace arm {
 
 using ::v8::internal::Object;
 using ::v8::internal::PrintF;
 using ::v8::internal::OS;
 using ::v8::internal::ReadLine;
 using ::v8::internal::DeleteArray;
 
 // This macro provides a platform independent use of sscanf. The reason for
 // SScanF not being implemented in a platform independent was through
 // ::v8::internal::OS in the same way as SNPrintF is that the Windows C Run-Time
@@ skipping 1628 matching lines @@
   set_register(r10, r10_val);
   set_register(r11, r11_val);
 
   int result = get_register(r0);
   return reinterpret_cast<Object*>(result);
 }
 
 } }  // namespace assembler::arm
 
 #endif  // !defined(__arm__)