Fixed random style violations.

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 95 matching lines @@
   // when constructing the REX prefix byte.
   int high_bit() const {
     return code_ >> 3;
   }
   // Return the 3 low bits of the register code.  Used when encoding registers
   // in modR/M, SIB, and opcode bytes.
   int low_bits() const {
     return code_ & 0x7;
   }
 
-  // (unfortunately we can't make this private in a struct when initializing
-  // by assignment.)
+  // Unfortunately we can't make this private in a struct when initializing
+  // by assignment.
   int code_;
 };
 
 extern Register rax;
 extern Register rcx;
 extern Register rdx;
 extern Register rbx;
 extern Register rsp;
 extern Register rbp;
 extern Register rsi;
@@ skipping 1278 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_H_