WIP: Create a public v8::DictionarySchema API for bulk reads from dict objects.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 6caab11752580f54f89610bf0621beae3b005bcd..cbb55feff6e1dd7eff61bf1f4e5ca905b40c1a58 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -357,6 +357,8 @@ bool HeapObject::IsJSCollection() const { return IsJSMap() || IsJSSet(); }
 
 bool HeapObject::IsDescriptorArray() const { return IsFixedArray(); }
 
+bool HeapObject::IsDictionarySchema() const { return IsFixedArray(); }
+
 bool HeapObject::IsFrameArray() const { return IsFixedArray(); }
 
 bool HeapObject::IsArrayList() const { return IsFixedArray(); }
@@ -623,6 +625,7 @@ CAST_ACCESSOR(DeoptimizationInputData)
 CAST_ACCESSOR(DeoptimizationOutputData)
 CAST_ACCESSOR(DependentCode)
 CAST_ACCESSOR(DescriptorArray)
+CAST_ACCESSOR(DictionarySchema)
 CAST_ACCESSOR(ExternalOneByteString)
 CAST_ACCESSOR(ExternalString)
 CAST_ACCESSOR(ExternalTwoByteString)