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

src/zone-inl.h

 // 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 13 matching lines @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_ZONE_INL_H_
 #define V8_ZONE_INL_H_
 
 #include "zone.h"
 #include "v8-counters.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 
 inline void* Zone::New(int size) {
   ASSERT(AssertNoZoneAllocation::allow_allocation());
   ASSERT(ZoneScope::nesting() > 0);
   // Round up the requested size to fit the alignment.
   size = RoundUp(size, kAlignment);
 
   // Check if the requested size is available without expanding.
   Address result = position_;
@@ skipping 18 matching lines @@
 
 void Zone::adjust_segment_bytes_allocated(int delta) {
   segment_bytes_allocated_ += delta;
   Counters::zone_segment_bytes.Set(segment_bytes_allocated_);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_INL_H_