Parse and show CWS data (reviews, number of users) in the inline install dialog.

Data is put into a ExtensionInstallUI::Prompt struct that is passed to
ShowExtensionInstallDialog implementations (currently only the GTK one actually
displays it). Ratings are shown as stars (resources were r99027). The dialog
also includes a CWS link for the item (this necessitated switching the GTK
implementation to a class so that the click handler callback could get at the
delegate and extension).

[email protected]

Review URL: http://codereview.chromium.org/7819006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@99205 0039d316-1c4b-4281-b951-d872f2087c98
16 files changed