Mac: Require child AllocateGpuMemoryBuffer to not fail

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 ebad42ad5b42c1d54322c2f59d5f340235848837..37dc971d30143ac90933dd103433789dafe18187 100644
--- a/content/child/child_io_surface_manager_mac.cc
+++ b/content/child/child_io_surface_manager_mac.cc
@@ -99,10 +99,7 @@ IOSurfaceRef ChildIOSurfaceManager::AcquireIOSurface(
   mach_port_t reply_port;
   kern_return_t kr = mach_port_allocate(mach_task_self(),
                                         MACH_PORT_RIGHT_RECEIVE, &reply_port);
-  if (kr != KERN_SUCCESS) {
-    MACH_LOG(ERROR, kr) << "mach_port_allocate";
-    return nullptr;
-  }
+  CHECK_EQ(KERN_SUCCESS, kr);
   base::mac::ScopedMachReceiveRight scoped_receive_right(reply_port);
 
   union {
@@ -124,20 +121,17 @@ IOSurfaceRef ChildIOSurfaceManager::AcquireIOSurface(
   kr = mach_msg(&data.request.header, MACH_SEND_MSG | MACH_RCV_MSG,
                 sizeof(data.request), sizeof(data.reply), reply_port,
                 MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
-  if (kr != KERN_SUCCESS) {
-    MACH_LOG(ERROR, kr) << "mach_msg";
-    return nullptr;
-  }
-  if (!data.reply.msg.result) {
-    DLOG(ERROR) << "Browser refused AcquireIOSurface request";
-    return nullptr;
-  }
+  CHECK_EQ(KERN_SUCCESS, kr);
+  CHECK(data.reply.msg.result);
 
   // Deallocate the right after creating an IOSurface reference.
   base::mac::ScopedMachSendRight scoped_io_surface_right(
       data.reply.msg.io_surface_port.name);
 
-  return IOSurfaceLookupFromMachPort(scoped_io_surface_right.get());
+  IOSurfaceRef io_surface =
+      IOSurfaceLookupFromMachPort(scoped_io_surface_right.get());
+  CHECK(io_surface);
+  return io_surface;
 }
 
 ChildIOSurfaceManager::ChildIOSurfaceManager() {}