Paint state transition for overlay 9 patch scrollbars
commitbc1fcc54f721c1c3821fa9002dd57eaa74b849e8
authorweiliangc@chromium.org <weiliangc@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Tue, 10 Jun 2014 22:13:03 +0000 (10 22:13 +0000)
committerweiliangc@chromium.org <weiliangc@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Tue, 10 Jun 2014 22:13:03 +0000 (10 22:13 +0000)
tree10562bef7cc5ca08930f19c9f9286c4030cde7c6
parentbc887fda7969787b267e8f5ac4e52195ab84e55c
Paint state transition for overlay 9 patch scrollbars

Add functionality to paint overlay scrollbar thumbs when it's between
different states (Normal/Hover/Pressed). Mainly paint linear transition
state of opacity for 9 patch scrollbar resources.

Blink side of change is 246293006.

BUG=307578

Review URL: https://codereview.chromium.org/238723004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276177 0039d316-1c4b-4281-b951-d872f2087c98
content/child/webthemeengine_impl_default.cc
content/child/webthemeengine_impl_default.h
ui/native_theme/native_theme.h
ui/native_theme/native_theme_aura.cc
ui/native_theme/native_theme_aura.h
ui/native_theme/native_theme_base.cc
ui/native_theme/native_theme_base.h