Mac: Don't CHECK that AcquireIOSurface succeeds

content/child/child_io_surface_manager_mac.cc

Index: content/child/child_io_surface_manager_mac.cc
diff --git a/content/child/child_io_surface_manager_mac.cc b/content/child/child_io_surface_manager_mac.cc
index 65df72b04aa034053d80a292362a0c234f574884..2f711815e4daef6803c8a3b8c96f2e2e8a7f6690 100644
--- a/content/child/child_io_surface_manager_mac.cc
+++ b/content/child/child_io_surface_manager_mac.cc
@@ -134,6 +134,10 @@ IOSurfaceRef ChildIOSurfaceManager::AcquireIOSurface(
     MACH_LOG(ERROR, kr) << "mach_msg";
     return nullptr;
   }
+  if (!data.reply.msg.result) {
+    DLOG(ERROR) << "Browser refused AcquireIOSurface request";
+    return nullptr;
+  }
 
   // Deallocate the right after creating an IOSurface reference.
   base::mac::ScopedMachSendRight scoped_io_surface_right(