Remove the default format from ResourcePool.

cc/resources/tile_manager.cc

Index: cc/resources/tile_manager.cc
diff --git a/cc/resources/tile_manager.cc b/cc/resources/tile_manager.cc
index 3ca3b1c503b957be3a1bb39f6c1278e109b9948f..794e08f63cbab5bc450bbe880f99a3c706660405 100644
--- a/cc/resources/tile_manager.cc
+++ b/cc/resources/tile_manager.cc
@@ -222,6 +222,7 @@ TileManager::TileManager(
       all_tiles_that_need_to_be_rasterized_are_scheduled_(true),
       did_check_for_completed_tasks_since_last_schedule_tasks_(true),
       did_oom_on_last_assign_(false),
+      resource_format_(tile_task_runner->GetResourceFormat()),
       ready_to_activate_notifier_(
           task_runner_.get(),
           base::Bind(&TileManager::NotifyReadyToActivate,
@@ -412,7 +413,7 @@ void TileManager::SynchronouslyRasterizeTiles(
 
   // Run and complete all raster task synchronously.
   rasterizer_->RasterizeTiles(
-      tiles_that_need_to_be_rasterized, resource_pool_,
+      tiles_that_need_to_be_rasterized, resource_pool_, resource_format_,
       base::Bind(&TileManager::UpdateTileDrawInfo, base::Unretained(this)));
 
   // Use on-demand raster for any required-for-draw tiles that have not been
@@ -622,7 +623,7 @@ void TileManager::AssignGpuMemoryToTiles(
     MemoryUsage memory_required_by_tile_to_be_scheduled;
     if (!tile->raster_task_.get()) {
       memory_required_by_tile_to_be_scheduled = MemoryUsage::FromConfig(
-          tile->desired_texture_size(), resource_pool_->default_format());
+          tile->desired_texture_size(), resource_format_);
     }
 
     bool tile_is_needed_now = priority.priority_bin == TilePriority::NOW;
@@ -756,7 +757,7 @@ scoped_refptr<ImageDecodeTask> TileManager::CreateImageDecodeTask(
 scoped_refptr<RasterTask> TileManager::CreateRasterTask(Tile* tile) {
   scoped_ptr<ScopedResource> resource =
       resource_pool_->AcquireResource(tile->desired_texture_size(),
-                                      resource_pool_->default_format());
+                                      resource_format_);
   const ScopedResource* const_resource = resource.get();
 
   // Create and queue all image decode tasks that this tile depends on.