cc: Remove low quality mode and cleanup tile versions.

cc/resources/tile.h

Index: cc/resources/tile.h
diff --git a/cc/resources/tile.h b/cc/resources/tile.h
index 04367fd9d0bf6ca2f70491cdd987b348ad7875d3..7c7f4f0f8345147d1f7cb2becf91bcb0214b9b96 100644
--- a/cc/resources/tile.h
+++ b/cc/resources/tile.h
@@ -11,7 +11,6 @@
 #include "cc/base/ref_counted_managed.h"
 #include "cc/resources/managed_tile_state.h"
 #include "cc/resources/picture_pile_impl.h"
-#include "cc/resources/raster_mode.h"
 #include "cc/resources/tile_priority.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
@@ -94,34 +93,20 @@ class CC_EXPORT Tile : public RefCountedManaged<Tile> {
     return !!(flags_ & USE_PICTURE_ANALYSIS);
   }
 
-  bool NeedsRasterForMode(RasterMode mode) const {
-    return !managed_state_.tile_versions[mode].IsReadyToDraw();
-  }
-
-  bool HasResources() const {
-    for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
-      if (managed_state_.tile_versions[mode].has_resource())
-        return true;
-    }
-    return false;
-  }
+  bool HasResources() const { return managed_state_.draw_info_.has_resource(); }
 
   void AsValueInto(base::debug::TracedValue* dict) const;
 
   inline bool IsReadyToDraw() const {
-    for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
-      if (managed_state_.tile_versions[mode].IsReadyToDraw())
-        return true;
-    }
-    return false;
+    return managed_state_.draw_info_.IsReadyToDraw();
   }
 
-  const ManagedTileState::TileVersion& GetTileVersionForDrawing() const {
-    for (int mode = 0; mode < NUM_RASTER_MODES; ++mode) {
-      if (managed_state_.tile_versions[mode].IsReadyToDraw())
-        return managed_state_.tile_versions[mode];
-    }
-    return managed_state_.tile_versions[HIGH_QUALITY_RASTER_MODE];
+  const ManagedTileState::TileDrawInfo& GetTileDrawInfo() const {
+    return managed_state_.draw_info_;
+  }
+
+  ManagedTileState::TileDrawInfo& GetTileDrawInfo() {
+    return managed_state_.draw_info_;
   }
 
   float contents_scale() const { return contents_scale_; }
@@ -143,17 +128,6 @@ class CC_EXPORT Tile : public RefCountedManaged<Tile> {
 
   gfx::Size size() const { return size_; }
 
-  RasterMode DetermineRasterModeForTree(WhichTree tree) const;
-  RasterMode DetermineOverallRasterMode() const;
-
-  // Functionality used in tests.
-  RasterMode GetRasterModeForTesting() const {
-    return managed_state().raster_mode;
-  }
-  ManagedTileState::TileVersion& GetTileVersionForTesting(RasterMode mode) {
-    return managed_state_.tile_versions[mode];
-  }
-
  private:
   friend class TileManager;
   friend class PrioritizedTileSet;
@@ -174,7 +148,6 @@ class CC_EXPORT Tile : public RefCountedManaged<Tile> {
 
   ManagedTileState& managed_state() { return managed_state_; }
   const ManagedTileState& managed_state() const { return managed_state_; }
-  RasterMode DetermineRasterModeForResolution(TileResolution resolution) const;
 
   bool HasRasterTask() const;