Bug 983259 - Use Windows 8 style icons for new-tab, tab scrollbox and dropdowns on Windows 8. r=Gijs

--HG--
rename : browser/themes/windows/tabbrowser/newtab.png => browser/themes/windows/tabbrowser/newtab-XPVista7.png
rename : browser/themes/windows/tabbrowser/tab-arrow-left.png => browser/themes/windows/tabbrowser/tab-arrow-left-XPVista7.png
rename : browser/themes/windows/toolbarbutton-dropdown-arrow.png => browser/themes/windows/toolbarbutton-dropdown-arrow-XPVista7.png
Bug 1069674 - Disable web audio tools on unsupported platforms. r=jryans
Bug 1077442 - Create a pseudo-PerformanceFront, r=vp
Bug 1088578 - Replace rgba(...,0) and hsla(...,0) with 'transparent' in CSS gradients. r=dao
Bug 1089643 - don't use decltype. r=smaug
Bug 1088568 - Remove reference to non-existing loop call. r=dao
Bug 1089376 - Report private browser site issues in private tab. r=margaret