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

src/scopeinfo.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 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_SCOPEINFO_H_
 #define V8_SCOPEINFO_H_
 
 #include "variables.h"
 
-namespace v8 { namespace internal {
+namespace v8 {
+namespace internal {
 
 // Scope information represents information about a functions's
 // scopes (currently only one, because we don't do any inlining)
 // and the allocation of the scope's variables. Scope information
 // is stored in a compressed form with Code objects and is used
 // at runtime (stack dumps, deoptimization, etc.).
 //
 // Historical note: In other VMs built by this team, ScopeInfo was
 // usually called DebugInfo since the information was used (among
 // other things) for on-demand debugging (Self, Smalltalk). However,
@@ skipping 114 matching lines @@
 
   // Create a ZoneScopeInfo instance from a Code object.
   explicit ZoneScopeInfo(Code* code)
       :  ScopeInfo<ZoneListAllocationPolicy>(code) {}
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPEINFO_H_