[stubs] Remove OnStackArgsDescriptor and friends.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 1bbf780e3068d745847dad8f4b1a76c8aa6d16d2..56c0f4d2cb61276cd7db14198b1bfcb216e4ba4b 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -488,12 +488,6 @@ class CodeStub BASE_EMBEDDED {
     return Descriptor(isolate());                                       \
   }
 
-#define DEFINE_ON_STACK_CALL_INTERFACE_DESCRIPTOR(PARAMETER_COUNT)         \
- public:                                                                   \
-  CallInterfaceDescriptor GetCallInterfaceDescriptor() const override {    \
-    return OnStackArgsDescriptorBase::ForArgs(isolate(), PARAMETER_COUNT); \
-  }
-
 // There are some code stubs we just can't describe right now with a
 // CallInterfaceDescriptor. Isolate behavior for those cases with this macro.
 // An attempt to retrieve a descriptor will fail.
@@ -2119,7 +2113,7 @@ class RegExpExecStub: public PlatformCodeStub {
  public:
   explicit RegExpExecStub(Isolate* isolate) : PlatformCodeStub(isolate) { }
 
-  DEFINE_ON_STACK_CALL_INTERFACE_DESCRIPTOR(4);
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(RegExpExec);
   DEFINE_PLATFORM_CODE_STUB(RegExpExec, PlatformCodeStub);
 };
 
@@ -3117,7 +3111,7 @@ class SubStringStub : public PlatformCodeStub {
  public:
   explicit SubStringStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
 
-  DEFINE_ON_STACK_CALL_INTERFACE_DESCRIPTOR(3);
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(SubString);
   DEFINE_PLATFORM_CODE_STUB(SubString, PlatformCodeStub);
 };