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

src/list-inl.h

 // Copyright 2006-2009 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 12 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // 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_LIST_INL_H_
 #define V8_LIST_INL_H_
 
 #include "list.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 
 template<typename T, class P>
 void List<T, P>::Add(const T& element) {
   if (length_ < capacity_) {
     data_[length_++] = element;
   } else {
     List<T, P>::ResizeAdd(element);
   }
 }
@@ skipping 112 matching lines @@
   ASSERT(capacity >= 0);
   data_ = (capacity > 0) ? NewData(capacity) : NULL;
   capacity_ = capacity;
   length_ = 0;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LIST_INL_H_