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

src/list.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 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // 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_H_
 #define V8_LIST_H_
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 
 // ----------------------------------------------------------------------------
 // The list is a template for very light-weight lists. We are not
 // using the STL because we want full control over space and speed of
 // the code. This implementation is based on code by Robert Griesemer
 // and Rob Pike.
 //
 // The list is parameterized by the type of its elements (T) and by an
 // allocation policy (P). The policy is used for allocating lists in
@@ skipping 97 matching lines @@
 
 // Add() is inlined, ResizeAdd() called by Add() is inlined except for
 // Lists of FrameElements, and ResizeAddInternal() is inlined in ResizeAdd().
 template <>
 void List<FrameElement,
           FreeStoreAllocationPolicy>::ResizeAdd(const FrameElement& element);
 
 } }  // namespace v8::internal
 
 #endif  // V8_LIST_H_