Begin to handlify the stub cache.

src/stub-cache.h

Index: src/stub-cache.h
diff --git a/src/stub-cache.h b/src/stub-cache.h
index fcb58e1f0828a360cc191ef27f201bbf61a0040f..2926ca41db4759559284ff1a093984435429f45c 100644
--- a/src/stub-cache.h
+++ b/src/stub-cache.h
@@ -72,43 +72,35 @@ class StubCache {
 
   void Initialize(bool create_heap_objects);
 
+  Handle<Code> ComputeLoadNonexistent(Handle<String> name,
+                                      Handle<JSObject> receiver);
 
-  // Computes the right stub matching. Inserts the result in the
-  // cache before returning.  This might compile a stub if needed.
-  MUST_USE_RESULT MaybeObject* ComputeLoadNonexistent(
-      String* name,
-      JSObject* receiver);
+  Handle<Code> ComputeLoadField(Handle<String> name,
+                                Handle<JSObject> receiver,
+                                Handle<JSObject> holder,
+                                int field_index);
 
-  MUST_USE_RESULT MaybeObject* ComputeLoadField(String* name,
-                                                JSObject* receiver,
-                                                JSObject* holder,
-                                                int field_index);
+  Handle<Code> ComputeLoadCallback(Handle<String> name,
+                                   Handle<JSObject> receiver,
+                                   Handle<JSObject> holder,
+                                   Handle<AccessorInfo> callback);
 
-  MUST_USE_RESULT MaybeObject* ComputeLoadCallback(
-      String* name,
-      JSObject* receiver,
-      JSObject* holder,
-      AccessorInfo* callback);
+  Handle<Code> ComputeLoadConstant(Handle<String> name,
+                                   Handle<JSObject> receiver,
+                                   Handle<JSObject> holder,
+                                   Handle<Object> value);
 
-  MUST_USE_RESULT MaybeObject* ComputeLoadConstant(String* name,
-                                                   JSObject* receiver,
-                                                   JSObject* holder,
-                                                   Object* value);
+  Handle<Code> ComputeLoadInterceptor(Handle<String> name,
+                                      Handle<JSObject> receiver,
+                                      Handle<JSObject> holder);
 
-  MUST_USE_RESULT MaybeObject* ComputeLoadInterceptor(
-      String* name,
-      JSObject* receiver,
-      JSObject* holder);
+  Handle<Code> ComputeLoadNormal();
 
-  MUST_USE_RESULT MaybeObject* ComputeLoadNormal();
-
-
-  MUST_USE_RESULT MaybeObject* ComputeLoadGlobal(
-      String* name,
-      JSObject* receiver,
-      GlobalObject* holder,
-      JSGlobalPropertyCell* cell,
-      bool is_dont_delete);
+  Handle<Code> ComputeLoadGlobal(Handle<String> name,
+                                 Handle<JSObject> receiver,
+                                 Handle<GlobalObject> holder,
+                                 Handle<JSGlobalPropertyCell> cell,
+                                 bool is_dont_delete);
 
 
   // ---
@@ -329,6 +321,7 @@ class StubCache {
 
   Isolate* isolate() { return isolate_; }
   Heap* heap() { return isolate()->heap(); }
+  Factory* factory() { return isolate()->factory(); }
 
  private:
   explicit StubCache(Isolate* isolate);
@@ -409,8 +402,8 @@ DECLARE_RUNTIME_FUNCTION(MaybeObject*, KeyedLoadPropertyWithInterceptor);
 // The stub compiler compiles stubs for the stub cache.
 class StubCompiler BASE_EMBEDDED {
  public:
-  StubCompiler()
-      : scope_(), masm_(Isolate::Current(), NULL, 256), failure_(NULL) { }
+  explicit StubCompiler(Isolate* isolate)
+      : isolate_(isolate), masm_(isolate, NULL, 256), failure_(NULL) { }
 
   MUST_USE_RESULT MaybeObject* CompileCallInitialize(Code::Flags flags);
   MUST_USE_RESULT MaybeObject* CompileCallPreMonomorphic(Code::Flags flags);
@@ -566,12 +559,12 @@ class StubCompiler BASE_EMBEDDED {
                                     String* name,
                                     LookupResult* lookup);
 
-  Isolate* isolate() { return scope_.isolate(); }
+  Isolate* isolate() { return isolate_; }
   Heap* heap() { return isolate()->heap(); }
   Factory* factory() { return isolate()->factory(); }
 
  private:
-  HandleScope scope_;
+  Isolate* isolate_;
   MacroAssembler masm_;
   Failure* failure_;
 };
@@ -579,6 +572,8 @@ class StubCompiler BASE_EMBEDDED {
 
 class LoadStubCompiler: public StubCompiler {
  public:
+  explicit LoadStubCompiler(Isolate* isolate) : StubCompiler(isolate) { }
+
   MUST_USE_RESULT MaybeObject* CompileLoadNonexistent(String* name,
                                                       JSObject* object,
                                                       JSObject* last);
@@ -615,6 +610,8 @@ class LoadStubCompiler: public StubCompiler {
 
 class KeyedLoadStubCompiler: public StubCompiler {
  public:
+  explicit KeyedLoadStubCompiler(Isolate* isolate) : StubCompiler(isolate) { }
+
   MUST_USE_RESULT MaybeObject* CompileLoadField(String* name,
                                                 JSObject* object,
                                                 JSObject* holder,
@@ -662,8 +659,8 @@ class KeyedLoadStubCompiler: public StubCompiler {
 
 class StoreStubCompiler: public StubCompiler {
  public:
-  explicit StoreStubCompiler(StrictModeFlag strict_mode)
-    : strict_mode_(strict_mode) { }
+  StoreStubCompiler(Isolate* isolate, StrictModeFlag strict_mode)
+      : StubCompiler(isolate), strict_mode_(strict_mode) { }
 
   MUST_USE_RESULT MaybeObject* CompileStoreField(JSObject* object,
                                                  int index,
@@ -689,8 +686,8 @@ class StoreStubCompiler: public StubCompiler {
 
 class KeyedStoreStubCompiler: public StubCompiler {
  public:
-  explicit KeyedStoreStubCompiler(StrictModeFlag strict_mode)
-    : strict_mode_(strict_mode) { }
+  KeyedStoreStubCompiler(Isolate* isolate, StrictModeFlag strict_mode)
+      : StubCompiler(isolate), strict_mode_(strict_mode) { }
 
   MUST_USE_RESULT MaybeObject* CompileStoreField(JSObject* object,
                                                  int index,
@@ -740,7 +737,8 @@ class CallOptimization;
 
 class CallStubCompiler: public StubCompiler {
  public:
-  CallStubCompiler(int argc,
+  CallStubCompiler(Isolate* isolate,
+                   int argc,
                    Code::Kind kind,
                    Code::ExtraICState extra_ic_state,
                    InlineCacheHolderFlag cache_holder);
@@ -833,7 +831,7 @@ class CallStubCompiler: public StubCompiler {
 
 class ConstructStubCompiler: public StubCompiler {
  public:
-  explicit ConstructStubCompiler() {}
+  explicit ConstructStubCompiler(Isolate* isolate) : StubCompiler(isolate) { }
 
   MUST_USE_RESULT MaybeObject* CompileConstructStub(JSFunction* function);