DevTools: [SSP] "background" has greater weight then "background-color"
DevTools: [SSP] "background" has greater weight then "background-color"

In the StylesSidebarPane property name autocompletion, the "background"
property name should be preferred over "background-color".

BUG=508945
R=pfeldman

Review URL: https://codereview.chromium.org/1233873002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@198787 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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