GitLab

There is no direct way to copy image url through context menu by
which user can copy image url. Added an option in context menu
for image to copy image url.

BUG=394314

Review URL: https://codereview.chromium.org/398803002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283746 0039d316-1c4b-4281-b951-d872f2087c98