Mojo: Move comment (per TODO).

TBR=darin@chromium.org

Review URL: https://codereview.chromium.org/188133002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255189 0039d316-1c4b-4281-b951-d872f2087c98

mojo/system/core_impl.cc

@@ -186,6 +186,13 @@ MojoResult CoreImpl::CreateMessagePipe(MojoHandle* message_pipe_handle0,
   return MOJO_RESULT_OK;
 }
 
+// Implementation note: To properly cancel waiters and avoid other races, this
+// does not transfer dispatchers from one handle to another, even when sending a
+// message in-process. Instead, it must transfer the "contents" of the
+// dispatcher to a new dispatcher, and then close the old dispatcher. If this
+// isn't done, in the in-process case, calls on the old handle may complete
+// after the the message has been received and a new handle created (and
+// possibly even after calls have been made on the new handle).
 MojoResult CoreImpl::WriteMessage(MojoHandle message_pipe_handle,
                                   const void* bytes,
                                   uint32_t num_bytes,

mojo/system/core_impl.h

@@ -117,15 +117,6 @@ class MOJO_SYSTEM_IMPL_EXPORT CoreImpl : public Core {
   // handle is marked busy. If it is, it fails (with |MOJO_RESULT_BUSY|). This
   // prevents |WriteMessage()| from sending a handle that has been closed (or
   // learning about this too late).
-  //
-  // TODO(vtl): Move this implementation note.
-  // To properly cancel waiters and avoid other races, |WriteMessage()| does not
-  // transfer dispatchers from one handle to another, even when sending a
-  // message in-process. Instead, it must transfer the "contents" of the
-  // dispatcher to a new dispatcher, and then close the old dispatcher. If this
-  // isn't done, in the in-process case, calls on the old handle may complete
-  // after the the message has been received and a new handle created (and
-  // possibly even after calls have been made on the new handle).
   struct HandleTableEntry {
     HandleTableEntry();
     explicit HandleTableEntry(const scoped_refptr<Dispatcher>& dispatcher);