Give the binary op stubs better names to make profiles more informative.

src/arm/codegen-arm.h

Index: src/arm/codegen-arm.h
===================================================================
--- src/arm/codegen-arm.h	(revision 3439)
+++ src/arm/codegen-arm.h	(working copy)
@@ -455,13 +455,15 @@
       : op_(op),
         mode_(mode),
         constant_rhs_(constant_rhs),
-        specialized_on_rhs_(RhsIsOneWeWantToOptimizeFor(op, constant_rhs)) { }
+        specialized_on_rhs_(RhsIsOneWeWantToOptimizeFor(op, constant_rhs)),
+        name_(NULL) { }
 
  private:
   Token::Value op_;
   OverwriteMode mode_;
   int constant_rhs_;
   bool specialized_on_rhs_;
+  char* name_;
 
   static const int kMaxKnownRhs = 0x40000000;
 
@@ -506,22 +508,7 @@
     return key;
   }
 
-  const char* GetName() {
-    switch (op_) {
-      case Token::ADD: return "GenericBinaryOpStub_ADD";
-      case Token::SUB: return "GenericBinaryOpStub_SUB";
-      case Token::MUL: return "GenericBinaryOpStub_MUL";
-      case Token::DIV: return "GenericBinaryOpStub_DIV";
-      case Token::MOD: return "GenericBinaryOpStub_MOD";
-      case Token::BIT_OR: return "GenericBinaryOpStub_BIT_OR";
-      case Token::BIT_AND: return "GenericBinaryOpStub_BIT_AND";
-      case Token::BIT_XOR: return "GenericBinaryOpStub_BIT_XOR";
-      case Token::SAR: return "GenericBinaryOpStub_SAR";
-      case Token::SHL: return "GenericBinaryOpStub_SHL";
-      case Token::SHR: return "GenericBinaryOpStub_SHR";
-      default:         return "GenericBinaryOpStub";
-    }
-  }
+  const char* GetName();
 
 #ifdef DEBUG
   void Print() {