Implement set trap for proxies, and revamp class hierarchy in preparation

src/arm/ic-arm.cc

Index: src/arm/ic-arm.cc
diff --git a/src/arm/ic-arm.cc b/src/arm/ic-arm.cc
index 8749eea5b247ccc1f1a80562f302112f5653cc2a..f8a3a015b2b503676f347ac8a32025b0ce9ff7a9 100644
--- a/src/arm/ic-arm.cc
+++ b/src/arm/ic-arm.cc
@@ -83,11 +83,11 @@ static void GenerateStringDictionaryReceiverCheck(MacroAssembler* masm,
   __ b(eq, miss);
 
   // Check that the receiver is a valid JS object.
-  __ CompareObjectType(receiver, t0, t1, FIRST_JS_OBJECT_TYPE);
+  __ CompareObjectType(receiver, t0, t1, FIRST_OBJECT_OR_FUNCTION_CLASS_TYPE);
   __ b(lt, miss);
 
   // If this assert fails, we have to check upper bound too.
-  ASSERT(LAST_TYPE == JS_FUNCTION_TYPE);
+  ASSERT(LAST_TYPE == LAST_OBJECT_OR_FUNCTION_CLASS_TYPE);
 
   GenerateGlobalInstanceTypeCheck(masm, t1, miss);
 
@@ -1212,8 +1212,12 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ cmp(r4, Operand(JS_ARRAY_TYPE));
   __ b(eq, &array);
   // Check that the object is some kind of JS object.
-  __ cmp(r4, Operand(FIRST_JS_OBJECT_TYPE));
+  __ cmp(r4, Operand(FIRST_JS_RECEIVER_TYPE));
   __ b(lt, &slow);
+  __ cmp(r4, Operand(JS_PROXY_TYPE));
+  __ b(eq, &slow);
+  __ cmp(r4, Operand(JS_FUNCTION_PROXY_TYPE));
+  __ b(eq, &slow);
 
   // Object case: Check key against length in the elements array.
   __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));