[stubs] Remove dead IncStub and DecStub

R=mvstanton@chromium.org
TBR=rmcilroy@chromium.org

Review-Url: https://codereview.chromium.org/2608683002
Cr-Commit-Position: refs/heads/master@{#41985}

src/code-factory.cc

@@ -257,18 +257,6 @@ TFS_BUILTIN(StringCharCodeAt)
 
 #undef TFS_BUILTIN
 
-// static
-Callable CodeFactory::Inc(Isolate* isolate) {
-  IncStub stub(isolate);
-  return make_callable(stub);
-}
-
-// static
-Callable CodeFactory::Dec(Isolate* isolate) {
-  DecStub stub(isolate);
-  return make_callable(stub);
-}
-
 // static
 Callable CodeFactory::StringAdd(Isolate* isolate, StringAddFlags flags,
                                 PretenureFlag pretenure_flag) {

src/code-factory.h

@@ -105,8 +105,6 @@ class V8_EXPORT_PRIVATE CodeFactory final {
   static Callable BitwiseAnd(Isolate* isolate);
   static Callable BitwiseOr(Isolate* isolate);
   static Callable BitwiseXor(Isolate* isolate);
-  static Callable Inc(Isolate* isolate);
-  static Callable Dec(Isolate* isolate);
   static Callable LessThan(Isolate* isolate);
   static Callable LessThanOrEqual(Isolate* isolate);
   static Callable GreaterThan(Isolate* isolate);

src/code-stubs.h

@@ -94,10 +94,8 @@ class Node;
   V(MultiplyWithFeedback)                     \
   V(DivideWithFeedback)                       \
   V(ModulusWithFeedback)                      \
-  V(Inc)                                      \
   V(InternalArrayNoArgumentConstructor)       \
   V(InternalArraySingleArgumentConstructor)   \
-  V(Dec)                                      \
   V(ElementsTransitionAndStore)               \
   V(FastCloneRegExp)                          \
   V(FastCloneShallowArray)                    \
@@ -731,22 +729,6 @@ class ModulusWithFeedbackStub final : public TurboFanCodeStub {
                                                     TurboFanCodeStub);
 };
 
-class IncStub final : public TurboFanCodeStub {
- public:
-  explicit IncStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}
-
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(CountOp);
-  DEFINE_TURBOFAN_UNARY_OP_CODE_STUB_WITH_FEEDBACK(Inc, TurboFanCodeStub);
-};
-
-class DecStub final : public TurboFanCodeStub {
- public:
-  explicit DecStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}
-
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(CountOp);
-  DEFINE_TURBOFAN_UNARY_OP_CODE_STUB_WITH_FEEDBACK(Dec, TurboFanCodeStub);
-};
-
 class StoreInterceptorStub : public TurboFanCodeStub {
  public:
   explicit StoreInterceptorStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}