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Add a pref "layout.accessiblecaret.always_show_when_scrolling" defaults to true on all platforms except b2g. When it is set to false, the carets will be hidden during scrolling, which is the current behavior before applying this change. The pref "layout.accessiblecaret.extendedvisibility" was added for Fennec to keep ActionBar open when carets temporarily hiding during panning or zooming. Now we make carets always show by default, so the pref can be removed. However, the floating toolbar still need to be notified when the scrolling begins, so we dispatch "scroll" instead. In gtest, the preference changes were in the middle of the test function. To make the preference change clearer, I add new pref changes or move the existing ones to the beginning of the test functions. The 250ms transition effect added in ua.css is per request of UX designer in bug 1249201 comment 12. MozReview-Commit-ID: 8NGvDLPbtNY --HG-- extra : rebase_source : 3f7a9ebdf4c70b0282dbf9e8f18cbe5cca656dbe |
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