GitLab

Moves the Embedder interface from OmniboxSuggestionsDropdown to a
separate file with the name: OmniboxSuggestionsDropdownEmbedder.

This interface used to be a standalone thing to begin with and we moved
it inside for the period of refactoring. It makes sense to have it
standalone, because that is the only part that embedder needs to
implement/know of to effectively integrate with the dropdown.

Bug: 1075602
Change-Id: Iee75626462b88b343790dbebc31477b9ae33e54d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2530894Reviewed-by: Filip Gorski <fgorski@chromium.org>
Reviewed-by: Patrick Noland <pnoland@chromium.org>
Reviewed-by: Tomasz Wiszkowski <ender@google.com>
Commit-Queue: Filip Gorski <fgorski@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826318}