cc: Low quality support for low res tiles

cc/resources/tile_manager.h

Index: cc/resources/tile_manager.h
diff --git a/cc/resources/tile_manager.h b/cc/resources/tile_manager.h
index 057ae92ec15f443fa4e432b637a3ae4b2c2def9d..28ed494027acdc3043231460d483294ec122b8e5 100644
--- a/cc/resources/tile_manager.h
+++ b/cc/resources/tile_manager.h
@@ -24,6 +24,15 @@ class ResourceProvider;
 class Tile;
 class TileVersion;
 
+// Low quality implies no lcd test;
+// high quality implies lcd text.
+enum TileRasterMode {
+  LOW_QUALITY_RASTER_MODE = 0,
+  HIGH_QUALITY_NO_LCD_RASTER_MODE = 1,
+  HIGH_QUALITY_RASTER_MODE = 2,

[reveman, 2013/06/05 18:01:32]

Maybe reverse the order of these so you can iterate from 0 to find best possible
tile version. Might also be good to add a comment here about them being in order
of what is preferred to draw.

[vmpstr, 2013/06/06 01:54:20]

Done.

+  NUM_RASTER_MODES

[reveman, 2013/06/05 18:01:32]

"NUM_RASTER_MODES = 3" to be consistent with TileManagerBin below.

[vmpstr, 2013/06/06 01:54:20]

Done.

+};
+
 class CC_EXPORT TileManagerClient {
  public:
   virtual void ScheduleManageTiles() = 0;
@@ -124,12 +133,15 @@ class CC_EXPORT TileManager {
       int layer_id;
       const void* tile_id;
       int source_frame_number;
+      TileRasterMode raster_mode;
   };
 
   void AssignBinsToTiles();
   void SortTiles();
+  TileRasterMode DetermineRasterMode(const Tile* tile) const;
   void AssignGpuMemoryToTiles();
   void FreeResourcesForTile(Tile* tile);
+  void FreeUnusedResourcesForTile(Tile* tile);
   void ScheduleManageTiles() {
     if (manage_tiles_pending_)
       return;
@@ -147,6 +159,7 @@ class CC_EXPORT TileManager {
       scoped_refptr<Tile> tile,
       scoped_ptr<ResourcePool::Resource> resource,
       PicturePileImpl::Analysis* analysis,
+      TileRasterMode raster_mode,
       bool was_canceled);
   void DidFinishTileInitialization(Tile* tile);
   void DidTileTreeBinChange(Tile* tile,