[generators] Decouple generator resume from fullcodegen.

src/x64/interface-descriptors-x64.cc

Index: src/x64/interface-descriptors-x64.cc
diff --git a/src/x64/interface-descriptors-x64.cc b/src/x64/interface-descriptors-x64.cc
index b10b52298bc811b9ddb5cbb26e0aa066ab33514c..d131f0f7df22e940a3053dbcaa7d6aa3a8b8408b 100644
--- a/src/x64/interface-descriptors-x64.cc
+++ b/src/x64/interface-descriptors-x64.cc
@@ -410,6 +410,16 @@ void InterpreterCEntryDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void ResumeGeneratorDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {
+      rax,  // the value to pass to the generator
+      rbx,  // the JSGeneratorObject to resume
+      rdx   // the resume mode (tagged)
+  };
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 }  // namespace internal
 }  // namespace v8