Merge bleeding edge into the GC branch up to 7948. The asserts

src/objects-debug.cc

Index: src/objects-debug.cc
===================================================================
--- src/objects-debug.cc	(revision 7948)
+++ src/objects-debug.cc	(working copy)
@@ -158,6 +158,9 @@
       break;
     case FILLER_TYPE:
       break;
+    case JS_PROXY_TYPE:
+      JSProxy::cast(this)->JSProxyVerify();
+      break;
     case PROXY_TYPE:
       Proxy::cast(this)->ProxyVerify();
       break;
@@ -469,6 +472,11 @@
 }
 
 
+void JSProxy::JSProxyVerify() {
+  ASSERT(IsJSProxy());
+  VerifyPointer(handler());
+}
+
 void Proxy::ProxyVerify() {
   ASSERT(IsProxy());
 }