Refactoring for merging ManagedTileState into Tile.
ManagedTileState has mainly two RasterTask and DrawInfo classes.
When TileManager get DrawInfo from tile, it should get the state
through referencing ManagedTileState. this makes a redundancy
reference.
This patch removes ManagedTileState and makes DrawInfo to
separated files(tile_draw_info). In addition, a tile has raster_task.
Review URL: https://codereview.chromium.org/793573006
Cr-Commit-Position: refs/heads/master@{#309351}
17 files changed
