[Webkit-unassigned] [Bug 118013] New: Make sure ImmutableStylePropertySet uses the new 16 bits size of StylePropertyMetadata

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=118013

           Summary: Make sure ImmutableStylePropertySet uses the new 16
                    bits size of StylePropertyMetadata
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: koivisto at iki.fi, akling at apple.com, alexis at webkit.org


Merge https://chromium.googlesource.com/chromium/blink/+/0b2d53414f5284639ebf13afb7ec8d075e9dfb5e

Make sure ImmutableStylePropertySet uses the new 16 bits size of StylePropertyMetadata.

We know that StylePropertyMetadata is 16 bits so we can patch the allocation
code of ImmutableStylePropertySet to take this into account.

This should save up ~1.8Mb on Apple membuster test.

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