[OpenLayers-Trac] [OpenLayers] #2904: move addTile code to the base class (OpenLayers.Layer.Grid)

[OpenLayers]

#2904: move addTile code to the base class (OpenLayers.Layer.Grid)
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 Reporter:  fredj       |       Owner:  elemoine    
     Type:  feature     |      Status:  new         
 Priority:  minor       |   Milestone:  2.11 Release
Component:  Layer.Grid  |     Version:  2.10        
 Keywords:              |       State:              
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 All classes inherited from {{{OpenLayers.Layer.Grid}}} have the same
 {{{addTile}}} implementation: they return a new
 {{{OpenLayers.Tile.Image}}} instance.

 This code could be moved to the base case.

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Ticket URL: <http://trac.openlayers.org/ticket/2904>
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