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..5757e5be77ba4f6e8ef369284f4776100afb558f 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 {
+  INVALID_RASTER_MODE = 0,

[reveman, 2013/06/05 14:25:13]

Do we need this enum?

+  LOW_QUALITY_RASTER_MODE = 1,
+  HIGH_QUALITY_NO_LCD_RASTER_MODE = 2,
+  HIGH_QUALITY_RASTER_MODE = 3
+};
+
 class CC_EXPORT TileManagerClient {
  public:
   virtual void ScheduleManageTiles() = 0;
@@ -124,10 +133,12 @@ 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 ScheduleManageTiles() {
@@ -142,11 +153,14 @@ class CC_EXPORT TileManager {
       scoped_refptr<Tile> tile,
       uint32_t pixel_ref_id);
   RasterTaskMetadata GetRasterTaskMetadata(const Tile& tile) const;
-  RasterWorkerPool::RasterTask CreateRasterTask(Tile* tile);
+  RasterWorkerPool::RasterTask CreateRasterTask(
+      Tile* tile,
+      ResourceProvider::ResourceId* resource_id);
   void OnRasterTaskCompleted(
       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,