Reland of [refactoring] Split CodeAssemblerState out of CodeAssembler

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 790f6879252c26bf37d002f3e7148b33bd4eb833..e080f57a209b04109f8f8477df08beb3e091b17a 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -251,8 +251,9 @@ Handle<Code> HydrogenCodeStub::GenerateRuntimeTailCall(
   const char* name = CodeStub::MajorName(MajorKey());
   Zone zone(isolate()->allocator(), ZONE_NAME);
   CallInterfaceDescriptor interface_descriptor(GetCallInterfaceDescriptor());
-  CodeStubAssembler assembler(isolate(), &zone, interface_descriptor,
-                              GetCodeFlags(), name);
+  compiler::CodeAssemblerState state(isolate(), &zone, interface_descriptor,
+                                     GetCodeFlags(), name);
+  CodeStubAssembler assembler(&state);
   int total_params = interface_descriptor.GetStackParameterCount() +
                      interface_descriptor.GetRegisterParameterCount();
   switch (total_params) {
@@ -284,7 +285,7 @@ Handle<Code> HydrogenCodeStub::GenerateRuntimeTailCall(
       UNIMPLEMENTED();
       break;
   }
-  return assembler.GenerateCode();
+  return compiler::CodeAssembler::GenerateCode(&state);
 }
 
 template <class Stub>