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

src/usage-analyzer.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 "usage-analyzer.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 // Weight boundaries
 static const int MinWeight = 1;
 static const int MaxWeight = 1000000;
 static const int InitialWeight = 100;
 
 
 class UsageComputer: public AstVisitor {
  public:
   static bool Traverse(Node* node);
@@ skipping 397 matching lines @@
 // ----------------------------------------------------------------------------
 // Interface to variable usage analysis
 
 bool AnalyzeVariableUsage(FunctionLiteral* lit) {
   if (!FLAG_usage_computation) return true;
   HistogramTimerScope timer(&Counters::usage_analysis);
   return UsageComputer::Traverse(lit);
 }
 
 } }  // namespace v8::internal