Revert of Allow one-copy task tile worker pool to use compressed textures.

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index f54764814e2924a4c19adf8bcf2cccec6b3ad6e3..405d68590da67bd73005aa601c48c66c0ad97627 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -47,10 +47,6 @@
 // When making odd-sized tiles, round them up to increase the chances
 // of using the same tile size.
 const int kTileRoundUp = 64;
-
-// For performance reasons and to support compressed tile textures, tile
-// width and height should be an even multiple of 4 in size.
-const int kTileMinimalAlignment = 4;
 
 }  // namespace
 
@@ -770,10 +766,6 @@
     tile_height = MathUtil::UncheckedRoundUp(tile_height, kTileRoundUp);
     tile_height = std::min(tile_height, default_tile_height);
   }
-
-  // Ensure that tile width and height are properly aligned.
-  tile_width = MathUtil::UncheckedRoundUp(tile_width, kTileMinimalAlignment);
-  tile_height = MathUtil::UncheckedRoundUp(tile_height, kTileMinimalAlignment);
 
   // Under no circumstance should we be larger than the max texture size.
   tile_width = std::min(tile_width, max_texture_size);