Enable stub generation using Hydrogen/Lithium (again)

src/arm/codegen-arm.h

Index: src/arm/codegen-arm.h
diff --git a/src/arm/codegen-arm.h b/src/arm/codegen-arm.h
index 8f0033e2cebe460b2f62b4ee484cc2fe09a2fa46..75899a948e7dcec3a56737a28a6c1f235463c0d0 100644
--- a/src/arm/codegen-arm.h
+++ b/src/arm/codegen-arm.h
@@ -44,6 +44,10 @@ enum TypeofState { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF };
 
 class CodeGenerator: public AstVisitor {
  public:
+  CodeGenerator() {
+    InitializeAstVisitor();
+  }
+
   static bool MakeCode(CompilationInfo* info);
 
   // Printing of AST, etc. as requested by flags.
@@ -68,6 +72,8 @@ class CodeGenerator: public AstVisitor {
                               int pos,
                               bool right_here = false);
 
+  DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
+
  private:
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
@@ -92,10 +98,10 @@ class StringCharLoadGenerator : public AllStatic {
 class MathExpGenerator : public AllStatic {
  public:
   static void EmitMathExp(MacroAssembler* masm,
-                          DoubleRegister input,
-                          DoubleRegister result,
-                          DoubleRegister double_scratch1,
-                          DoubleRegister double_scratch2,
+                          DwVfpRegister input,
+                          DwVfpRegister result,
+                          DwVfpRegister double_scratch1,
+                          DwVfpRegister double_scratch2,
                           Register temp1,
                           Register temp2,
                           Register temp3);