A64: Synchronize with r17441.

src/a64/assembler-a64.h

Index: src/a64/assembler-a64.h
diff --git a/src/a64/assembler-a64.h b/src/a64/assembler-a64.h
index 7c2bfb859424fbeeaa1a39de8b177c77f4bb554f..2739f6a2d5478f349264e29c0d20a2a86cbc99c4 100644
--- a/src/a64/assembler-a64.h
+++ b/src/a64/assembler-a64.h
@@ -104,7 +104,6 @@ class CPURegister {
   bool IsValidFPRegister() const;
   bool IsNone() const;
   bool Is(const CPURegister& other) const;
-  bool is(const CPURegister& other) const;  // V8 compatibility.
 
   bool IsZero() const;
   bool IsSP() const;
@@ -119,6 +118,10 @@ class CPURegister {
 
   bool IsSameSizeAndType(const CPURegister& other) const;
 
+  // V8 compatibility.
+  bool is(const CPURegister& other) const { return Is(other); }
+  bool is_valid() const { return IsValid(); }
+
  protected:
   unsigned code_;
   unsigned size_;