Harmonize naming a bit, x64 was the only platform where Register::from_code was called Register::...

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 107 matching lines @@
       "rdi",
       "r8",
       "r9",
       "r11",
       "r14",
       "r15"
     };
     return names[index];
   }
 
-  static Register toRegister(int code) {
+  static Register from_code(int code) {
     Register r = { code };
     return r;
   }
   bool is_valid() const { return 0 <= code_ && code_ < kNumRegisters; }
   bool is(Register reg) const { return code_ == reg.code_; }
   int code() const {
     ASSERT(is_valid());
     return code_;
   }
   int bit() const {
@@ skipping 1488 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_H_