Caused by RootInlineBox::paddedLayoutOverflowRect(). This increases the apparent size of the inline content (pixelSnappedLogicalRight() calls ceilf()), but RenderLayer::hasHorizontalOverflow() compares that against renderBox()->pixelSnappedClientWidth(), which simply rounds.
Causes fast/css-intrinsic-dimensions/width-avoid-floats.html to fail.
Created attachment 247472 [details] Reduction
<rdar://problem/19979430>
Created attachment 247566 [details] Patch
Comment on attachment 247566 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=247566&action=review > Source/WebCore/rendering/RootInlineBox.cpp:840 > // FIXME: Audit whether to use pixel snapped values when not using integers for layout: https://bugs.webkit.org/show_bug.cgi?id=63656 Remove?
Created attachment 247567 [details] Patch
Comment on attachment 247567 [details] Patch EWS testing.
Comment on attachment 247567 [details] Patch Attachment 247567 [details] did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.appspot.com/results/4958076213919744 New failing tests: fast/forms/control-restrict-line-height.html fast/css/text-overflow-input.html editing/input/caret-at-the-edge-of-input.html fast/forms/basic-inputs.html fast/forms/input-disabled-color.html fast/forms/search/search-size-with-decorations.html http/tests/navigation/javascriptlink-frames.html
Created attachment 247574 [details] Archive of layout-test-results from ews107 for mac-mavericks-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: ews107 Port: mac-mavericks-wk2 Platform: Mac OS X 10.9.5
Created attachment 247585 [details] Patch
Comment on attachment 247585 [details] Patch Clearing flags on attachment: 247585 Committed r180815: <http://trac.webkit.org/changeset/180815>
All reviewed patches have been landed. Closing bug.