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

src/arm/assembler-arm.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 21 matching lines @@
 
 // The original source code covered by the above license above has been modified
 // significantly by Google Inc.
 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 
 #include "v8.h"
 
 #include "arm/assembler-arm-inl.h"
 #include "serialize.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 // -----------------------------------------------------------------------------
 // Implementation of Register and CRegister
 
 Register no_reg = { -1 };
 
 Register r0  = {  0 };
 Register r1  = {  1 };
 Register r2  = {  2 };
 Register r3  = {  3 };
@@ skipping 1411 matching lines @@
     bind(&after_pool);
   }
 
   // Since a constant pool was just emitted, move the check offset forward by
   // the standard interval.
   next_buffer_check_ = pc_offset() + kCheckConstInterval;
 }
 
 
 } }  // namespace v8::internal