Mac: Ensure that Mach messages always get a reply

content/browser/browser_io_surface_manager_mac_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/browser_io_surface_manager_mac.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
@@ skipping 13 matching lines @@
     return io_surface_manager_.GenerateChildProcessToken(child_process_id);
   }
 
   void InvalidateChildProcessToken(const IOSurfaceManagerToken& token) {
     io_surface_manager_.InvalidateChildProcessToken(token);
   }
 
   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 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.
   void RegisterIOSurface(const IOSurfaceManagerToken& gpu_process_token,
                          int io_surface_id,
                          int client_id,
                          mach_port_t io_surface_port) {
     IOSurfaceManagerHostMsg_RegisterIOSurface request = {{0}};
     IOSurfaceManagerMsg_RegisterIOSurfaceReply reply = {{0}};
     request.io_surface_id = io_surface_id;
@@ skipping 221 matching lines @@
   request.io_surface_id = kIOSurfaceId;
   memcpy(request.token_name, child_process_token.name,
          sizeof(child_process_token.name));
   EXPECT_TRUE(HandleAcquireIOSurfaceRequest(request, &reply));
   // Should return invalid port.
   EXPECT_EQ(static_cast<mach_port_t>(MACH_PORT_NULL),
             reply.io_surface_port.name);
 }
 
 }  // namespace content