Bug 1179987 - Remove painted region from SurfaceDescriptorTiles since it isn't used any more. r=nical

gfx/layers/client/TiledContentClient.cpp

@@ -866,7 +866,7 @@ ClientTiledLayerBuffer::GetSurfaceDescriptorTiles()
     // Reset the update rect
     tile.mUpdateRect = IntRect();
   }
-  return SurfaceDescriptorTiles(mValidRegion, mPaintedRegion,
+  return SurfaceDescriptorTiles(mValidRegion,
                                 tiles,
                                 mTiles.mFirst.x, mTiles.mFirst.y,
                                 mTiles.mSize.width, mTiles.mSize.height,

gfx/layers/composite/TiledContentHost.cpp

@@ -379,7 +379,6 @@ TiledLayerBufferComposite::Clear()
   mTiles.mFirst = TileIntPoint();
   mTiles.mSize = TileIntSize();
   mValidRegion = nsIntRegion();
-  mPaintedRegion = nsIntRegion();
   mResolution = 1.0;
 }
 

gfx/layers/ipc/LayersMessages.ipdlh

@@ -332,7 +332,6 @@ union TileDescriptor {
 
 struct SurfaceDescriptorTiles {
   nsIntRegion validRegion;
-  nsIntRegion paintedRegion;
   TileDescriptor[] tiles;
   int         firstTileX;
   int         firstTileY;