Support for chrome.browserAction.setIcon(imageData) on linux.
Support for chrome.browserAction.setIcon(imageData) on linux.

This updates BrowserActionButton so it picks up the icon from the extension->browser_action_state().

Review URL: http://codereview.chromium.org/300027

git-svn-id: http://src.chromium.org/svn/trunk/src@29824 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 980730c6d77db1affdcebeceac458080728cfd2e
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser