mac: Periodically shim new malloc zones immediately after startup.

content/child/child_thread_impl.cc

Index: content/child/child_thread_impl.cc
diff --git a/content/child/child_thread_impl.cc b/content/child/child_thread_impl.cc
index 977d87a566ec04e003f288de6b234c69f07f4cbe..e254a6f26b2acc663303513698473f87ae97cf0e 100644
--- a/content/child/child_thread_impl.cc
+++ b/content/child/child_thread_impl.cc
@@ -78,6 +78,10 @@
 #include "content/public/common/content_descriptors.h"
 #endif
 
+#if defined(OS_MACOSX)
+#include "base/allocator/allocator_interception_mac.h"
+#endif
+
 using tracked_objects::ThreadData;
 
 namespace content {
@@ -553,6 +557,10 @@ void ChildThreadImpl::Init(const Options& options) {
       connection_timeout = temp;
   }
 
+#if defined(OS_MACOSX)
+  base::allocator::PeriodicallyShimNewMallocZones();
+#endif
+
   message_loop_->task_runner()->PostDelayedTask(
       FROM_HERE, base::Bind(&ChildThreadImpl::EnsureConnected,
                             channel_connected_factory_->GetWeakPtr()),