Update gc branch to bleeding_edge revision 8862.

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index 564acec80dbbff6e21c0cadc4816138dbd3904be..54afc645d4b67106a5e39e7bbebaadf83914a325 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -156,6 +156,9 @@ void HeapObject::HeapObjectVerify() {
     case JS_ARRAY_TYPE:
       JSArray::cast(this)->JSArrayVerify();
       break;
+    case JS_WEAK_MAP_TYPE:
+      JSWeakMap::cast(this)->JSWeakMapVerify();
+      break;
     case JS_REGEXP_TYPE:
       JSRegExp::cast(this)->JSRegExpVerify();
       break;
@@ -321,7 +324,7 @@ void FixedArray::FixedArrayVerify() {
 void FixedDoubleArray::FixedDoubleArrayVerify() {
   for (int i = 0; i < length(); i++) {
     if (!is_the_hole(i)) {
-      double value = get(i);
+      double value = get_scalar(i);
       ASSERT(!isnan(value) ||
              (BitCast<uint64_t>(value) ==
               BitCast<uint64_t>(canonical_not_the_hole_nan_as_double())));
@@ -461,6 +464,14 @@ void JSArray::JSArrayVerify() {
 }
 
 
+void JSWeakMap::JSWeakMapVerify() {
+  CHECK(IsJSWeakMap());
+  JSObjectVerify();
+  VerifyHeapPointer(table());
+  ASSERT(table()->IsHashTable());
+}
+
+
 void JSRegExp::JSRegExpVerify() {
   JSObjectVerify();
   ASSERT(data()->IsUndefined() || data()->IsFixedArray());