[Interpreter] Remove unnecessary const specifiers on scalar types.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1269813006

Cr-Commit-Position: refs/heads/master@{#29961}

src/interpreter/bytecodes.cc

@@ -52,7 +52,7 @@ Bytecode Bytecodes::FromByte(uint8_t value) {
 
 
 // static
-const int Bytecodes::NumberOfOperands(Bytecode bytecode) {
+int Bytecodes::NumberOfOperands(Bytecode bytecode) {
   DCHECK(bytecode <= Bytecode::kLast);
   int count;
   uint8_t row = ToByte(bytecode);
@@ -66,24 +66,24 @@ const int Bytecodes::NumberOfOperands(Bytecode bytecode) {
 
 
 // static
-const OperandType Bytecodes::GetOperandType(Bytecode bytecode, int i) {
+OperandType Bytecodes::GetOperandType(Bytecode bytecode, int i) {
   DCHECK(bytecode <= Bytecode::kLast && i < NumberOfOperands(bytecode));
   return kBytecodeTable[ToByte(bytecode)][i];
 }
 
 
 // static
-const int Bytecodes::Size(Bytecode bytecode) {
+int Bytecodes::Size(Bytecode bytecode) {
   return 1 + NumberOfOperands(bytecode);
 }
 
 
 // static
-const int Bytecodes::MaximumNumberOfOperands() { return kMaxOperands; }
+int Bytecodes::MaximumNumberOfOperands() { return kMaxOperands; }
 
 
 // static
-const int Bytecodes::MaximumSize() { return 1 + kMaxOperands; }
+int Bytecodes::MaximumSize() { return 1 + kMaxOperands; }
 
 
 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode) {

src/interpreter/bytecodes.h

@@ -66,19 +66,19 @@ class Bytecodes {
   static Bytecode FromByte(uint8_t value);
 
   // Returns the number of operands expected by |bytecode|.
-  static const int NumberOfOperands(Bytecode bytecode);
+  static int NumberOfOperands(Bytecode bytecode);
 
   // Return the i-th operand of |bytecode|.
-  static const OperandType GetOperandType(Bytecode bytecode, int i);
+  static OperandType GetOperandType(Bytecode bytecode, int i);
 
   // Returns the size of the bytecode including its arguments.
-  static const int Size(Bytecode bytecode);
+  static int Size(Bytecode bytecode);
 
   // The maximum number of operands across all bytecodes.
-  static const int MaximumNumberOfOperands();
+  static int MaximumNumberOfOperands();
 
   // Maximum size of a bytecode and its arguments.
-  static const int MaximumSize();
+  static int MaximumSize();
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes);