Keep two empty lines between declarations for cpp files

src/x64/macro-assembler-x64.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 954 matching lines @@
     xorl(dst, dst);
   } else if (is_uint32(x)) {
     movl(dst, Immediate(static_cast<uint32_t>(x)));
   } else if (is_int32(x)) {
     movq(dst, Immediate(static_cast<int32_t>(x)));
   } else {
     movq(dst, x, RelocInfo::NONE64);
   }
 }
 
+
 void MacroAssembler::Set(const Operand& dst, int64_t x) {
   if (is_int32(x)) {
     movq(dst, Immediate(static_cast<int32_t>(x)));
   } else {
     Set(kScratchRegister, x);
     movq(dst, kScratchRegister);
   }
 }
 
 
@@ skipping 37 matching lines @@
     xorl(kScratchRegister, kScratchRegister);
     return kScratchRegister;
   }
   if (value == 1) {
     return kSmiConstantRegister;
   }
   LoadSmiConstant(kScratchRegister, source);
   return kScratchRegister;
 }
 
+
 void MacroAssembler::LoadSmiConstant(Register dst, Smi* source) {
   if (emit_debug_code()) {
     movq(dst,
          reinterpret_cast<uint64_t>(Smi::FromInt(kSmiConstantRegisterValue)),
          RelocInfo::NONE64);
     cmpq(dst, kSmiConstantRegister);
     if (allow_stub_calls()) {
       Assert(equal, "Uninitialized kSmiConstantRegister");
     } else {
       Label ok;
@@ skipping 3686 matching lines @@
   j(greater, &no_info_available);
   CompareRoot(MemOperand(scratch_reg, -AllocationSiteInfo::kSize),
               Heap::kAllocationSiteInfoMapRootIndex);
   bind(&no_info_available);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64