GitLab

This CL converts SpellCheckPanelHostPtr|Request to the new Mojo
types. Major changes are as below,

  - Convert mojom::SpellCheckPanelHostPtr to
    mojo::Remote<mojom::SpellCheckPanelHost>
  - Convert mojo::SpellCheckPanelHostRequest to
    mojo::PendingReceiver<mojom::SpellCheckPanelHost>
  - Convert mojo::BindingSet to mojo::ReceiverSet

Bug: 955171
Change-Id: I2e8934227b97a685cb02c9c1a7a00b2ed0b3c746
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1935967Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Commit-Queue: Gyuyoung Kim <gyuyoung@igalia.com>
Cr-Commit-Position: refs/heads/master@{#719952}