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

cc/tiles/tile_manager.cc

Index: cc/tiles/tile_manager.cc
diff --git a/cc/tiles/tile_manager.cc b/cc/tiles/tile_manager.cc
index 477025f3f80f9da5f0eb9304eafe787d7c398c64..76bba03fd5c43acdb3785e7f74ebc428f80d886a 100644
--- a/cc/tiles/tile_manager.cc
+++ b/cc/tiles/tile_manager.cc
@@ -671,8 +671,10 @@ scoped_refptr<RasterTask> TileManager::CreateRasterTask(
   if (resource) {
     resource_content_id = tile->invalidated_id();
     DCHECK_EQ(DetermineResourceFormat(tile), resource->format());
-    DCHECK_EQ(tile->desired_texture_size().ToString(),
-              resource->size().ToString());
+    if (!IsResourceFormatCompressed(resource->format())) {

[reveman, 2015/12/02 18:27:18]

nit: is this conditional still needed? In that case please use:

DCHECK_IMPLIES(!IsResourceFormatCompressed(reso..),
               tile->desired_texture_size().ToString() ==
               resource->size().ToString());

[christiank, 2015/12/03 12:57:59]

No longer need, removed.

+      DCHECK_EQ(tile->desired_texture_size().ToString(),
+                resource->size().ToString());
+    }
   } else {
     resource = resource_pool_->AcquireResource(tile->desired_texture_size(),
                                                DetermineResourceFormat(tile));