Revert of Disallow subclassing Arrays.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 472070123a0fd14f5ac62b423d03801f1ceff164..b5cf5cec5c1ac71ca6f14e4fed3f68e0d57fbd9b 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -2252,7 +2252,6 @@
   __ j(not_equal, &miss);
 
   __ mov(ebx, ecx);
-  __ mov(edx, edi);
   ArrayConstructorStub stub(masm->isolate(), arg_count());
   __ TailCallStub(&stub);
 
@@ -4631,7 +4630,6 @@
   //  -- eax : argc (only if argument_count() == ANY)
   //  -- ebx : AllocationSite or undefined
   //  -- edi : constructor
-  //  -- edx : Original constructor
   //  -- esp[0] : return address
   //  -- esp[4] : last argument
   // -----------------------------------
@@ -4652,14 +4650,10 @@
   }
 
   Label no_info;
-  Label subclassing;
   // If the feedback vector is the undefined value call an array constructor
   // that doesn't use AllocationSites.
   __ cmp(ebx, isolate()->factory()->undefined_value());
   __ j(equal, &no_info);
-
-  __ cmp(edx, edi);
-  __ j(not_equal, &subclassing);
 
   // Only look at the lower 16 bits of the transition info.
   __ mov(edx, FieldOperand(ebx, AllocationSite::kTransitionInfoOffset));
@@ -4670,9 +4664,6 @@
 
   __ bind(&no_info);
   GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES);
-
-  __ bind(&subclassing);
-  __ TailCallRuntime(Runtime::kThrowArrayNotSubclassableError, 0, 1);
 }