[Isolates] Merge from bleeding_edge to isolates, revisions 6100-6300.

src/objects-inl.h

Index: src/objects-inl.h
===================================================================
--- src/objects-inl.h	(revision 6941)
+++ src/objects-inl.h	(working copy)
@@ -755,6 +755,11 @@
 }
 
 
+bool Object::IsArgumentsMarker() {
+  return IsOddball() && Oddball::cast(this)->kind() == Oddball::kArgumentMarker;
+}
+
+
 double Object::Number() {
   ASSERT(IsNumber());
   return IsSmi()
@@ -2320,7 +2325,6 @@
 
 
 void Map::set_instance_type(InstanceType value) {
-  ASSERT(0 <= value && value < 256);
   WRITE_BYTE_FIELD(this, kInstanceTypeOffset, value);
 }
 
@@ -3310,28 +3314,28 @@
 
 
 Object* JSBuiltinsObject::javascript_builtin(Builtins::JavaScript id) {
-  ASSERT(0 <= id && id < kJSBuiltinsCount);
+  ASSERT(id < kJSBuiltinsCount);  // id is unsigned.
   return READ_FIELD(this, OffsetOfFunctionWithId(id));
 }
 
 
 void JSBuiltinsObject::set_javascript_builtin(Builtins::JavaScript id,
                                               Object* value) {
-  ASSERT(0 <= id && id < kJSBuiltinsCount);
+  ASSERT(id < kJSBuiltinsCount);  // id is unsigned.
   WRITE_FIELD(this, OffsetOfFunctionWithId(id), value);
   WRITE_BARRIER(this, OffsetOfFunctionWithId(id));
 }
 
 
 Code* JSBuiltinsObject::javascript_builtin_code(Builtins::JavaScript id) {
-  ASSERT(0 <= id && id < kJSBuiltinsCount);
+  ASSERT(id < kJSBuiltinsCount);  // id is unsigned.
   return Code::cast(READ_FIELD(this, OffsetOfCodeWithId(id)));
 }
 
 
 void JSBuiltinsObject::set_javascript_builtin_code(Builtins::JavaScript id,
                                                    Code* value) {
-  ASSERT(0 <= id && id < kJSBuiltinsCount);
+  ASSERT(id < kJSBuiltinsCount);  // id is unsigned.
   WRITE_FIELD(this, OffsetOfCodeWithId(id), value);
   ASSERT(!HEAP->InNewSpace(value));
 }