Fix presubmit errors caused by updated depot tools

src/x64/assembler-x64.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 435 matching lines @@
       return IsSupported(f);
     }
     uint64_t enabled = isolate->enabled_cpu_features();
     return (enabled & (V8_UINT64_C(1) << f)) != 0;
   }
 #endif
 
   // Enable a specified feature within a scope.
   class Scope BASE_EMBEDDED {
 #ifdef DEBUG
+
    public:
     explicit Scope(CpuFeature f) {
       uint64_t mask = V8_UINT64_C(1) << f;
       ASSERT(CpuFeatures::IsSupported(f));
       ASSERT(!Serializer::enabled() ||
              (CpuFeatures::found_by_runtime_probing_ & mask) == 0);
       isolate_ = Isolate::UncheckedCurrent();
       old_enabled_ = 0;
       if (isolate_ != NULL) {
         old_enabled_ = isolate_->enabled_cpu_features();
         isolate_->set_enabled_cpu_features(old_enabled_ | mask);
       }
     }
     ~Scope() {
       ASSERT_EQ(Isolate::UncheckedCurrent(), isolate_);
       if (isolate_ != NULL) {
         isolate_->set_enabled_cpu_features(old_enabled_);
       }
     }
+
    private:
     Isolate* isolate_;
     uint64_t old_enabled_;
 #else
+
    public:
     explicit Scope(CpuFeature f) {}
 #endif
   };
 
  private:
   // Safe defaults include SSE2 and CMOV for X64. It is always available, if
   // anyone checks, but they shouldn't need to check.
   // The required user mode extensions in X64 are (from AMD64 ABI Table A.1):
   //   fpu, tsc, cx8, cmov, mmx, sse, sse2, fxsr, syscall
@@ skipping 1138 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_H_