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

src/ast.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 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.
 
 #include "v8.h"
 
 #include "ast.h"
 #include "scopes.h"
 #include "string-stream.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 
 VariableProxySentinel VariableProxySentinel::this_proxy_(true);
 VariableProxySentinel VariableProxySentinel::identifier_proxy_(false);
 ValidLeftHandSideSentinel ValidLeftHandSideSentinel::instance_;
 Property Property::this_property_(VariableProxySentinel::this_proxy(), NULL, 0);
 Call Call::sentinel_(NULL, NULL, 0);
 CallEval CallEval::sentinel_(NULL, NULL, 0);
 
 
@@ skipping 457 matching lines @@
     if (kInfinity - max_match_ < node_max_match) {
       max_match_ = kInfinity;
     } else {
       max_match_ += node->max_match();
     }
   }
 }
 
 
 } }  // namespace v8::internal