[Webkit-unassigned] [Bug 107099] New: Coordinated Graphics: Remove m_pendingSyncBackingStores in LayerTreeRenderer.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=107099

           Summary: Coordinated Graphics: Remove
                    m_pendingSyncBackingStores in LayerTreeRenderer.
           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


LayerTreeRenderer difficultly uses m_pendingSyncBackingStores to set a backing
store to TextureMapperLayer, although LayerTreeRenderer easily sets a direct
composited image to TextureMapperLayer. It is because LayerTreeRenderer directly
set a backing store to TextureMapperLayer, instead of GraphicsLayerTextureMapper.

This patch makes LayerTreeRenderer set a backing store to GraphicsLayerTextureMapper
and then GraphicsLayerTextureMapper will set a backing store to TextureMapperLayer
like other members.

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