[CI] More replacments of calls to LayoutObject.Style() with LayoutObject.StyleRef()

This continues the work done in https://chromium-review.googlesource.com/c/chromium/src/+/1171144,
this time expanding the set of folders considered for replacement, and the scope of the replacements.
With this CL, I believe I have replaced most references to Style() with StyleRef() within
these folders:
 - paint
 - layout
 - svg
 - frame

Note that I only replaced immediate uses of Style(), i.e. Style()->Xyz. These are guaranteed not to
cause any breakage (assuming I did the replacement well) because they already dereferenced the
pointer. There are many references to Style() where the result is first checked, or where
the actual pointer is passed around, and I have not touched those (yet). Perhaps for a later CL.

I have also consciously not modified code in other folders (including animation, css, dom, editing, exported,
html, input, layout/ng, page, and style). The reason I skipped these is that, at least for now, I
am not sure that Style can always safely be assumed to be available (non-null). There are definitely
cases where that can be inferred, but I didn't want to change some references in a folder and not others.
Perhaps for a later CL.

Bug: 872508
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ie2293901477ef3ed8912582d206bdaac8fd000e1
Reviewed-on: https://chromium-review.googlesource.com/1182185
Commit-Queue: Philip Rogers <pdr@chromium.org>
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585491}
124 files changed