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

src/code-stubs.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 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "v8.h"
 
 #include "bootstrapper.h"
 #include "code-stubs.h"
 #include "factory.h"
 #include "macro-assembler.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 Handle<Code> CodeStub::GetCode() {
   uint32_t key = GetKey();
   int index = Heap::code_stubs()->FindNumberEntry(key);
   if (index == -1) {
     HandleScope scope;
 
     // Update the static counter each time a new code stub is generated.
     Counters::code_stubs.Increment();
 
@@ skipping 87 matching lines @@
     case JSExit:
       return "JSExit";
     default:
       UNREACHABLE();
       return NULL;
   }
 }
 
 
 } }  // namespace v8::internal