Add compositing, layers to app_list_demo

cc/layers/tiled_layer.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layers/tiled_layer.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/auto_reset.h"
@@ skipping 465 matching lines @@
   // texture updater to be deleted.  However, we can't free the memory backing
   // the SkCanvas until the paint finishes, so we grab a local reference here to
   // hold the updater alive until the paint completes.
   scoped_refptr<LayerUpdater> protector(Updater());
   gfx::Rect painted_opaque_rect;
   Updater()->PrepareToUpdate(paint_rect,
                              tiler_->tile_size(),
                              1.f / width_scale,
                              1.f / height_scale,
                              &painted_opaque_rect);
+  DLOG(INFO) << painted_opaque_rect.ToString();
 
   for (int j = top; j <= bottom; ++j) {
     for (int i = left; i <= right; ++i) {
       UpdatableTile* tile = TileAt(i, j);
       DCHECK(tile);  // Did SetTexturePriorites get skipped?
                      // TODO(enne): This should not ever be null.
       if (!tile)
         continue;
 
       gfx::Rect tile_rect = tiler_->tile_bounds(i, j);
@@ skipping 396 matching lines @@
   gfx::Rect prepaint_rect = visible_content_rect();
   prepaint_rect.Inset(-tiler_->tile_size().width() * kPrepaintColumns,
                       -tiler_->tile_size().height() * kPrepaintRows);
   gfx::Rect content_rect(content_bounds());
   prepaint_rect.Intersect(content_rect);
 
   return prepaint_rect;
 }
 
 }  // namespace cc