Revert "Turn the NumberToStringStub into a hydrogen stub."

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index 2f3cbdd4d57999dd6ea908b9a38b116104287ee9..0335607754a984cf82795698df0d99aa950cc5ae 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -59,16 +59,6 @@ void ToNumberStub::InitializeInterfaceDescriptor(
 }
 
 
-void NumberToStringStub::InitializeInterfaceDescriptor(
-    Isolate* isolate,
-    CodeStubInterfaceDescriptor* descriptor) {
-  static Register registers[] = { r0 };
-  descriptor->register_param_count_ = 1;
-  descriptor->register_params_ = registers;
-  descriptor->deoptimization_handler_ = NULL;
-}
-
-
 void FastCloneShallowArrayStub::InitializeInterfaceDescriptor(
     Isolate* isolate,
     CodeStubInterfaceDescriptor* descriptor) {
@@ -982,6 +972,22 @@ static void EmitCheckForInternalizedStringsOrObjects(MacroAssembler* masm,
 }
 
 
+void NumberToStringStub::Generate(MacroAssembler* masm) {
+  Label runtime;
+
+  __ ldr(r1, MemOperand(sp, 0));
+
+  // Generate code to lookup number in the number string cache.
+  __ LookupNumberStringCache(r1, r0, r2, r3, r4, &runtime);
+  __ add(sp, sp, Operand(1 * kPointerSize));
+  __ Ret();
+
+  __ bind(&runtime);
+  // Handle number to string in the runtime system if not found in the cache.
+  __ TailCallRuntime(Runtime::kNumberToStringSkipCache, 1, 1);
+}
+
+
 static void ICCompareStub_CheckInputType(MacroAssembler* masm,
                                          Register input,
                                          Register scratch,