Remove --ui-enable-software-compositing flag.

This flag is redundant with --disable-gpu which causes us to fall into
software compositing mode.

Depends on: https://codereview.chromium.org/167973003/

R=piman@chromium.org, piman
BUG=

Review URL: https://codereview.chromium.org/166163007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252093 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252093
Copy the job factory for the SystemPolicyRequestContext.

The SystemPolicyRequestContext wraps the system request context and is used
to make cloud policy requests that shouldn't be related to a particular user.

Some tests intercept requests sent via the system request context. By
copying the job factory, those interceptors will also see the requests going
through the SystemPolicyRequestContext.

BUG=None

Review URL: https://codereview.chromium.org/172463003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252095 0039d316-1c4b-4281-b951-d872f2087c98
bookmarks: Rename bookmark_context_menu_test.cc to bookmark_context_menu_unittest.cc

We use unittest.cc suffix for tests that use gtest and are not
interactive ui tests or browser tests. This is also more consistent with
the files around.

BUG=180681
TEST=unit_tests
R=sky@chromium.org

Review URL: https://codereview.chromium.org/169013002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252096 0039d316-1c4b-4281-b951-d872f2087c98
Update local BaseScrollBar::contents_scroll_offset_ on Update.

Make ScrollByContentsOffset() work as intended after resize.
contents_scroll_offset_ was not being updated on Update().
Add a test that fails without this fix. Fix an Aura include.

BUG=344490
TEST=Click page icon, click "Show cookies and site data". Expand a node to make a scrollbar appear, scroll down; collapse the node, re-expand the node; scrolling down should work.
R=sky@chromium.org

Review URL: https://codereview.chromium.org/171423003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252097 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252097