Some Isolate usage cleanups in objects.{h,cc}.

Review URL: http://codereview.chromium.org/6723001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7312 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/objects-inl.h

@@ -1134,9 +1134,7 @@ Heap* HeapObject::GetHeap() {
 
 
 Isolate* HeapObject::GetIsolate() {
-  Isolate* i = GetHeap()->isolate();
-  ASSERT(i == Isolate::Current());
-  return i;
+  return GetHeap()->isolate();
 }
 
 
@@ -2815,6 +2813,11 @@ Code* Code::GetCodeFromTargetAddress(Address address) {
 }
 
 
+Isolate* Map::isolate() {
+  return heap()->isolate();
+}
+
+
 Heap* Map::heap() {
   // NOTE: address() helper is not used to save one instruction.
   Heap* heap = Page::FromAddress(reinterpret_cast<Address>(this))->heap_;
@@ -2850,7 +2853,7 @@ MaybeObject* Map::GetFastElementsMap() {
   }
   Map* new_map = Map::cast(obj);
   new_map->set_has_fast_elements(true);
-  COUNTERS->map_slow_to_fast_elements()->Increment();
+  isolate()->counters()->map_slow_to_fast_elements()->Increment();
   return new_map;
 }
 
@@ -2863,7 +2866,7 @@ MaybeObject* Map::GetSlowElementsMap() {
   }
   Map* new_map = Map::cast(obj);
   new_map->set_has_fast_elements(false);
-  COUNTERS->map_fast_to_slow_elements()->Increment();
+  isolate()->counters()->map_fast_to_slow_elements()->Increment();
   return new_map;
 }
 
@@ -2878,7 +2881,7 @@ MaybeObject* Map::NewExternalArrayElementsMap() {
   Map* new_map = Map::cast(obj);
   new_map->set_has_fast_elements(false);
   new_map->set_has_external_array_elements(true);
-  COUNTERS->map_to_external_array_elements()->Increment();
+  isolate()->counters()->map_to_external_array_elements()->Increment();
   return new_map;
 }
 

src/objects.cc

@@ -1259,7 +1259,7 @@ MaybeObject* JSObject::AddFastProperty(String* name,
   Isolate* isolate = GetHeap()->isolate();
   StringInputBuffer buffer(name);
   if (!isolate->scanner_constants()->IsIdentifier(&buffer)
-      && name != HEAP->hidden_symbol()) {
+      && name != isolate->heap()->hidden_symbol()) {
     Object* obj;
     { MaybeObject* maybe_obj =
           NormalizeProperties(CLEAR_INOBJECT_PROPERTIES, 0);
@@ -5211,8 +5211,6 @@ static inline bool CompareStringContentsPartial(Isolate* isolate,
 
 
 bool String::SlowEquals(String* other) {
-  Heap* heap = GetHeap();
-
   // Fast check: negative check with lengths.
   int len = length();
   if (len != other->length()) return false;
@@ -5239,7 +5237,7 @@ bool String::SlowEquals(String* other) {
                                     Vector<const char>(str2, len));
   }
 
-  Isolate* isolate = heap->isolate();
+  Isolate* isolate = GetIsolate();
   if (lhs->IsFlat()) {
     if (lhs->IsAsciiRepresentation()) {
       Vector<const char> vec1 = lhs->ToAsciiVector();

src/objects.h

@@ -3776,7 +3776,8 @@ class Map: public HeapObject {
   inline int visitor_id();
   inline void set_visitor_id(int visitor_id);
 
-  // Returns the heap this map belongs to.
+  // Returns the isolate/heap this map belongs to.
+  inline Isolate* isolate();
   inline Heap* heap();
 
   typedef void (*TraverseCallback)(Map* map, void* data);