Update gc branch to bleeding_edge revision 8862.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 71432eedf82f8307e673775d19e592d4496ce8d0..1cd11e4b17614d7938a751a2957a1214254daf77 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -419,7 +419,9 @@ void Heap::GarbageCollectionEpilogue() {
 #if defined(DEBUG)
   ReportStatisticsAfterGC();
 #endif  // DEBUG
+#ifdef ENABLE_DEBUGGER_SUPPORT
   isolate_->debug()->AfterGarbageCollection();
+#endif  // ENABLE_DEBUGGER_SUPPORT
 }
 
 
@@ -1352,6 +1354,10 @@ class ScavengingVisitor : public StaticVisitorBase {
                     &ObjectEvacuationStrategy<POINTER_OBJECT>::
                         template VisitSpecialized<SharedFunctionInfo::kSize>);
 
+    table_.Register(kVisitJSWeakMap,
+                    &ObjectEvacuationStrategy<POINTER_OBJECT>::
+                    Visit);
+
     table_.Register(kVisitJSRegExp,
                     &ObjectEvacuationStrategy<POINTER_OBJECT>::
                     Visit);
@@ -2476,40 +2482,41 @@ MaybeObject* Heap::AllocateForeign(Address address, PretenureFlag pretenure) {
 
 
 MaybeObject* Heap::AllocateSharedFunctionInfo(Object* name) {
-  Object* result;
-  { MaybeObject* maybe_result =
-        Allocate(shared_function_info_map(), OLD_POINTER_SPACE);
-    if (!maybe_result->ToObject(&result)) return maybe_result;
-  }
+  SharedFunctionInfo* share;
+  MaybeObject* maybe = Allocate(shared_function_info_map(), OLD_POINTER_SPACE);
+  if (!maybe->To<SharedFunctionInfo>(&share)) return maybe;
 
-  SharedFunctionInfo* share = SharedFunctionInfo::cast(result);
+  // Set pointer fields.
   share->set_name(name);
   Code* illegal = isolate_->builtins()->builtin(Builtins::kIllegal);
   share->set_code(illegal);
   share->set_scope_info(SerializedScopeInfo::Empty());
-  Code* construct_stub = isolate_->builtins()->builtin(
-      Builtins::kJSConstructStubGeneric);
+  Code* construct_stub =
+      isolate_->builtins()->builtin(Builtins::kJSConstructStubGeneric);
   share->set_construct_stub(construct_stub);
-  share->set_expected_nof_properties(0);
-  share->set_length(0);
-  share->set_formal_parameter_count(0);
   share->set_instance_class_name(Object_symbol());
   share->set_function_data(undefined_value());
   share->set_script(undefined_value());
-  share->set_start_position_and_type(0);
   share->set_debug_info(undefined_value());
   share->set_inferred_name(empty_string());
-  share->set_compiler_hints(0);
-  share->set_deopt_counter(Smi::FromInt(FLAG_deopt_every_n_times));
   share->set_initial_map(undefined_value());
-  share->set_this_property_assignments_count(0);
   share->set_this_property_assignments(undefined_value());
-  share->set_opt_count(0);
+  share->set_deopt_counter(Smi::FromInt(FLAG_deopt_every_n_times));
+
+  // Set integer fields (smi or int, depending on the architecture).
+  share->set_length(0);
+  share->set_formal_parameter_count(0);
+  share->set_expected_nof_properties(0);
   share->set_num_literals(0);
+  share->set_start_position_and_type(0);
   share->set_end_position(0);
   share->set_function_token_position(0);
-  share->set_native(false);
-  return result;
+  // All compiler hints default to false or 0.
+  share->set_compiler_hints(0);
+  share->set_this_property_assignments_count(0);
+  share->set_opt_count(0);
+
+  return share;
 }