Remove WebMediaPlayerImpl::starting_ as it's redundant.

WebMediaPlayerImpl::seeking_ essentially tracks the same state.

BUG=144683

Review URL: https://codereview.chromium.org/343053003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278791 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed