Implement MojoGetBufferInformation(), part 2.

mojo/edk/system/core.cc

 // Copyright 2013 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/edk/system/core.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 500 matching lines @@
   if (new_handle == MOJO_HANDLE_INVALID) {
     LOG(ERROR) << "Handle table full";
     new_dispatcher->Close();
     return MOJO_RESULT_RESOURCE_EXHAUSTED;
   }
 
   new_buffer_handle.Put(new_handle);
   return MOJO_RESULT_OK;
 }
 
+MojoResult Core::GetBufferInformation(MojoHandle buffer_handle,
+                                      UserPointer<MojoBufferInformation> info,
+                                      uint32_t info_num_bytes) {
+  RefPtr<Dispatcher> dispatcher(GetDispatcher(buffer_handle));
+  if (!dispatcher)
+    return MOJO_RESULT_INVALID_ARGUMENT;
+
+  return dispatcher->GetBufferInformation(info, info_num_bytes);
+}
+
 MojoResult Core::MapBuffer(MojoHandle buffer_handle,
                            uint64_t offset,
                            uint64_t num_bytes,
                            UserPointer<void*> buffer,
                            MojoMapBufferFlags flags) {
   RefPtr<Dispatcher> dispatcher(GetDispatcher(buffer_handle));
   if (!dispatcher)
     return MOJO_RESULT_INVALID_ARGUMENT;
 
   std::unique_ptr<PlatformSharedBufferMapping> mapping;
@@ skipping 74 matching lines @@
   if (signals_states) {
     for (; i < num_handles; i++)
       signals_states[i] = dispatchers[i]->GetHandleSignalsState();
   }
 
   return rv;
 }
 
 }  // namespace system
 }  // namespace mojo