Moved the styling for the #urlbar-zoom-button which was duplicated among browser/themes/linux/browser.css, browser/themes/osx/browser.css, and browser/themes/windows/browser.css to a new shared file browser/themes/shared/browser.inc.css. Also added the new file to browser/themes/shared/jar.inc.mn.
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extra : rebase_source : c755450072f871b14f7bfb3e21423a299800301b
Vedant Sareen