[Webkit-unassigned] [Bug 116947] New: [Exclusions] Correct some problems that disabling subpixel layout exposed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=116947

           Summary: [Exclusions] Correct some problems that disabling
                    subpixel layout exposed
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: simon.fraser at apple.com, dino at apple.com,
                    mihnea at adobe.com, bjonesbe at adobe.com


Merge https://chromium.googlesource.com/chromium/blink/+/84540f0de96206eb3a4be98fec1cb3bd7d19ec4e

First round of changes to correct exclusion tests that started failing when subpixel layout was turned off, and to correct some problems that disabling subpixel layout exposed.

This set of changes just corrects four tests. It also revises the subpixel-utils code to bring it into line with the most recent LayoutUnit et al changes and to simplify its use a little. The ExclusionPolygon appendArc() method was corrected, so that the 3rd of 5 additional vertices is in the center of the arc. The firstIncludedIntervalLogicalTop() methods now use ceiledLayoutUnit() to convert a float to a LayoutUnit within the shape.

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