[Webkit-unassigned] [Bug 104640] New: [GTK] REGRESSION(r135620): Accelerated Compositing does not draw some pages.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=104640

           Summary: [GTK] REGRESSION(r135620): Accelerated Compositing
                    does not draw some pages.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: luxtella at company100.net


After r135620, Accelerated Compositing does not draw some pages, because r135620 changes the tree-traversal.
Before r135620, we returned early if TextureMapperLayer can not gain TextureMapper from the root layer. However, after r135620, we run the tree-traversal even if TextureMapperLayer can not gain TextureMapper.
This patch makes TextureMapperLayer return early like code before r135620.

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