Implement in-heap backing store for typed arrays.

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 9f1f085fc7701362d68d00fed153486fc826467b..2b5cf8be1f4224e1179f474259297f89864c59c2 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -729,7 +729,7 @@ Handle<ExternalArray> Factory::NewExternalArray(int length,
                                                 ExternalArrayType array_type,
                                                 void* external_pointer,
                                                 PretenureFlag pretenure) {
-  ASSERT(0 <= length);
+  ASSERT(0 <= length && length <= Smi::kMaxValue);
   CALL_HEAP_FUNCTION(
       isolate(),
       isolate()->heap()->AllocateExternalArray(length,
@@ -740,6 +740,20 @@ Handle<ExternalArray> Factory::NewExternalArray(int length,
 }
 
 
+Handle<FixedTypedArrayBase> Factory::NewFixedTypedArray(
+    int length,
+    ExternalArrayType array_type,
+    PretenureFlag pretenure) {
+  ASSERT(0 <= length && length <= Smi::kMaxValue);
+  CALL_HEAP_FUNCTION(
+      isolate(),
+      isolate()->heap()->AllocateFixedTypedArray(length,
+                                                 array_type,
+                                                 pretenure),
+      FixedTypedArrayBase);
+}
+
+
 Handle<Cell> Factory::NewCell(Handle<Object> value) {
   AllowDeferredHandleDereference convert_to_cell;
   CALL_HEAP_FUNCTION(