[stubs] A new approach to TF stubs

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index f90b800dbc28a328bd09e41ea167c2f7b2db38e4..62ba43f578b9b8ab84c2e0b5e8f4fde9bd0fa9ea 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -1141,20 +1141,6 @@ Handle<Code> StoreTransitionStub::GenerateCode() {
 
 
 template <>
-HValue* CodeStubGraphBuilder<StringLengthStub>::BuildCodeStub() {
-  HValue* string = BuildLoadNamedField(GetParameter(0),
-      FieldIndex::ForInObjectOffset(JSValue::kValueOffset));
-  return BuildLoadNamedField(string,
-      FieldIndex::ForInObjectOffset(String::kLengthOffset));
-}
-
-
-Handle<Code> StringLengthStub::GenerateCode() {
-  return DoGenerateCode(this);
-}
-
-
-template <>
 HValue* CodeStubGraphBuilder<StoreFastElementStub>::BuildCodeStub() {
   BuildUncheckedMonomorphicElementAccess(
       GetParameter(StoreDescriptor::kReceiverIndex),