Mojo: Refactor URLLoader interface.

mojo/shell/in_process_dynamic_service_runner.cc

 // Copyright 2014 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 "mojo/shell/in_process_dynamic_service_runner.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 56 matching lines @@
     if (mojo_set_system_thunks_fn) {
       MojoSystemThunks system_thunks = MojoMakeSystemThunks();
       size_t expected_size = mojo_set_system_thunks_fn(&system_thunks);
       if (expected_size > sizeof(MojoSystemThunks)) {
         LOG(ERROR)
             << "Invalid app library: expected MojoSystemThunks size: "
             << expected_size;
         break;
       }
     } else {
+      // In the component build, Mojo Apps link against mojo_system_impl.
+#if !defined(COMPONENT_BUILD)
       // Strictly speaking this is not required, but it's very unusual to have
       // an app that doesn't require the basic system library.
       LOG(WARNING) << "MojoSetSystemThunks not found in app library";
+#endif
     }
 
     typedef MojoResult (*MojoMainFunction)(MojoHandle);
     MojoMainFunction main_function = reinterpret_cast<MojoMainFunction>(
         app_library.GetFunctionPointer("MojoMain"));
     if (!main_function) {
       LOG(ERROR) << "Entrypoint MojoMain not found";
       break;
     }
 
     // |MojoMain()| takes ownership of the service handle.
     MojoResult result = main_function(service_handle_.release().value());
     if (result < MOJO_RESULT_OK)
       LOG(ERROR) << "MojoMain returned an error: " << result;
   } while (false);
 
   bool success = app_completed_callback_runner_.Run();
   app_completed_callback_runner_.Reset();
   LOG_IF(ERROR, !success) << "Failed post run app_completed_callback";
 }
 
 }  // namespace shell
 }  // namespace mojo