Move UA stylesheets for HTML from core/css/ to core/html/resources.

html.css, quirks.css, and theme*.css are parts of HTML element
implementation. So they should be in core/html/ for better modularity.

Also, this CL renames some of their basenames:
 - themeChromiumAndroid.css -> android.css
 - themeChromiumLinux.css -> linux.css
 - themeMac.css -> mac.css
 - themeWin.css -> win.css
 - themeWinQuirks.css -> win_quirks.css
 - themeInputMultipleFields.css -> input_multiple_fields.css

This CL should not have any user-visible behavior changes.

Change-Id: Iff9f5547200f87167c7751c941fe11167345d128
Reviewed-on: https://chromium-review.googlesource.com/c/1351194
Commit-Queue: Kent Tamura <tkent@chromium.org>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612168}
18 files changed