Refactor to split ZoomToFindInPageRect between the view/frame widgets.

The CL performs a refactor to prepare for adding an OOPIF path for
ZoomToFindInPageRect.

Bug: 734209
Change-Id: I9575f84d4850ad13b869892c23e8f109ea8f80e4
Reviewed-on: https://chromium-review.googlesource.com/c/1358912
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: James MacLean <wjmaclean@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614475}
7 files changed