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

src/ia32/assembler-ia32-inl.h

 // 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 @@
 // modified significantly by Google Inc.
 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 
 // A light-weight IA32 Assembler.
 
 #ifndef V8_IA32_ASSEMBLER_IA32_INL_H_
 #define V8_IA32_ASSEMBLER_IA32_INL_H_
 
 #include "cpu.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 Condition NegateCondition(Condition cc) {
   return static_cast<Condition>(cc ^ 1);
 }
 
 
 // The modes possibly affected by apply must be in kApplyMask.
 void RelocInfo::apply(int delta) {
   if (rmode_ == RUNTIME_ENTRY || IsCodeTarget(rmode_)) {
     int32_t* p = reinterpret_cast<int32_t*>(pc_);
@@ skipping 256 matching lines @@
 
 Operand::Operand(int32_t disp, RelocInfo::Mode rmode) {
   // [disp/r]
   set_modrm(0, ebp);
   set_dispr(disp, rmode);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_ASSEMBLER_IA32_INL_H_