Revert of [refactoring] Split CodeAssemblerState out of CodeAssembler

src/fast-accessor-assembler.cc

Index: src/fast-accessor-assembler.cc
diff --git a/src/fast-accessor-assembler.cc b/src/fast-accessor-assembler.cc
index dd4fe01520a623852bf82f9e69b03d14a545fb3b..ee9b241186e0e76218071dbbc44de5da97f79c89 100644
--- a/src/fast-accessor-assembler.cc
+++ b/src/fast-accessor-assembler.cc
@@ -10,6 +10,7 @@
 #include "src/handles-inl.h"
 #include "src/objects.h"  // For FAA::LoadInternalField impl.
 
+using v8::internal::CodeStubAssembler;
 using v8::internal::compiler::Node;
 
 namespace v8 {
@@ -18,9 +19,9 @@
 FastAccessorAssembler::FastAccessorAssembler(Isolate* isolate)
     : zone_(isolate->allocator(), ZONE_NAME),
       isolate_(isolate),
-      assembler_state_(isolate, zone(), 1, Code::ComputeFlags(Code::STUB),
-                       "FastAccessorAssembler"),
-      assembler_(new CodeStubAssembler(&assembler_state_)),
+      assembler_(new CodeStubAssembler(isolate, zone(), 1,
+                                       Code::ComputeFlags(Code::STUB),
+                                       "FastAccessorAssembler")),
       state_(kBuilding) {}
 
 FastAccessorAssembler::~FastAccessorAssembler() { Clear(); }
@@ -247,7 +248,7 @@
 
 MaybeHandle<Code> FastAccessorAssembler::Build() {
   CHECK_EQ(kBuilding, state_);
-  Handle<Code> code = compiler::CodeAssembler::GenerateCode(&assembler_state_);
+  Handle<Code> code = assembler_->GenerateCode();
   state_ = !code.is_null() ? kBuilt : kError;
   Clear();
   return code;