Keep two empty lines between declarations for cpp files

src/execution.cc

 // Copyright 2012 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 847 matching lines @@
 
   // Clear the debug break request flag.
   isolate->stack_guard()->Continue(DEBUGBREAK);
 
   ProcessDebugMessages(debug_command_only);
 
   // Return to continue execution.
   return isolate->heap()->undefined_value();
 }
 
+
 void Execution::ProcessDebugMessages(bool debug_command_only) {
   Isolate* isolate = Isolate::Current();
   // Clear the debug command request flag.
   isolate->stack_guard()->Continue(DEBUGCOMMAND);
 
   StackLimitCheck check(isolate);
   if (check.HasOverflowed()) {
     return;
   }
 
@@ skipping 44 matching lines @@
   }
   if (stack_guard->IsFullDeopt()) {
     stack_guard->Continue(FULL_DEOPT);
     Deoptimizer::DeoptimizeAll(isolate);
   }
   return isolate->heap()->undefined_value();
 }
 
 
 } }  // namespace v8::internal