Mac: Ensure that Mach messages always get a reply

content/browser/browser_io_surface_manager_mac_unittest.cc

Index: content/browser/browser_io_surface_manager_mac_unittest.cc
diff --git a/content/browser/browser_io_surface_manager_mac_unittest.cc b/content/browser/browser_io_surface_manager_mac_unittest.cc
index 1c77ee38f796366176571f6f125d7098ef75e669..94a536381bbd80d90fb2208e3e72d7ec9aed7417 100644
--- a/content/browser/browser_io_surface_manager_mac_unittest.cc
+++ b/content/browser/browser_io_surface_manager_mac_unittest.cc
@@ -31,18 +31,23 @@ class BrowserIOSurfaceManagerTest : public testing::Test {
   bool HandleRegisterIOSurfaceRequest(
       const IOSurfaceManagerHostMsg_RegisterIOSurface& request,
       IOSurfaceManagerMsg_RegisterIOSurfaceReply* reply) {
-    return io_surface_manager_.HandleRegisterIOSurfaceRequest(request, reply);
+    io_surface_manager_.HandleRegisterIOSurfaceRequest(request, reply);
+    return reply->result;
   }
 
   bool HandleUnregisterIOSurfaceRequest(
       const IOSurfaceManagerHostMsg_UnregisterIOSurface& request) {
-    return io_surface_manager_.HandleUnregisterIOSurfaceRequest(request);
+    bool result = false;
+    io_surface_manager_.HandleUnregisterIOSurfaceRequest(request,
+                                                         &result);
+    return result;
   }
 
   bool HandleAcquireIOSurfaceRequest(
       const IOSurfaceManagerHostMsg_AcquireIOSurface& request,
       IOSurfaceManagerMsg_AcquireIOSurfaceReply* reply) {
-    return io_surface_manager_.HandleAcquireIOSurfaceRequest(request, reply);
+    io_surface_manager_.HandleAcquireIOSurfaceRequest(request, reply);
+    return reply->result;
   }
 
   // Helper function used to register an IOSurface for testing.