[chromedriver] Remove xvfb logging.

Passing -a fixed the issue, no need to pollute stdout.

BUG=None
R=craigdh@chromium.org

Review URL: https://codereview.chromium.org/41713002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230828 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230828
Use copy-swap idiom for GURL::operator=

All the work to correctly handle ownership and internal state of GURL
is already done by the copy-constructor, destructor, and GURL::Swap.
Repeating that work for GURL::operator= is just another place where we
might get it wrong.

BUG=309975

Review URL: https://codereview.chromium.org/30693010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230829 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230829
Enable reference adoption checks for Blink+skia in Debug builds.

This is an alternate to Issue 29763002.

R=junov@chromium.org

Review URL: https://codereview.chromium.org/40973002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230831 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230831