cc: Move pre-decodes to background worker.

cc/tiles/tile_manager_unittest.cc

 // Copyright 2013 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 <stddef.h>
 #include <stdint.h>
 
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 2509 matching lines @@
   // Set the tile priority rects such that only the tile with the second image
   // is scheduled for decodes, since it is checker-imaged.
   gfx::Rect rect_to_raster(600, 0, 300, 900);
   active_tiling->SetTilePriorityRectsForTesting(
       gfx::Rect(rect_to_raster),   // Visible rect.
       gfx::Rect(rect_to_raster),   // Skewport rect.
       gfx::Rect(rect_to_raster),   // Soon rect.
       gfx::Rect(rect_to_raster));  // Eventually rect.
   host_impl()->tile_manager()->PrepareTiles(host_impl()->global_tile_state());
 
+  // Finish all raster and dispatch completion callback so that the decode work
+  // for checkered images can be scheduled.
+  static_cast<SynchronousTaskGraphRunner*>(task_graph_runner())->RunUntilIdle();
+  base::RunLoop().RunUntilIdle();
+
   // Run decode tasks to trigger completion of any pending decodes.
   FlushDecodeTasks();
 
   // Create a new pending tree to invalidate tiles for decoded images and verify
   // that only tiles for |image2| are invalidated.
   EXPECT_TRUE(host_impl()->client()->did_request_impl_side_invalidation());
   PerformImplSideInvalidation();
   for (int i = 0; i < 2; i++) {
     for (int j = 0; j < 2; j++) {
       const Tile* tile = pending_tiling->TileAt(i, j);
@@ skipping 89 matching lines @@
   gfx::Rect complete_tiling_rect(layer_bounds);
   PictureLayerTiling* active_tiling =
       active_layer()->picture_layer_tiling_set()->tiling_at(0);
   active_tiling->SetTilePriorityRectsForTesting(
       complete_tiling_rect,   // Visible rect.
       complete_tiling_rect,   // Skewport rect.
       complete_tiling_rect,   // Soon rect.
       complete_tiling_rect);  // Eventually rect.
   host_impl()->tile_manager()->PrepareTiles(host_impl()->global_tile_state());
 
+  // Finish all raster work so the decode work for checkered images can be
+  // scheduled.
+  static_cast<SynchronousTaskGraphRunner*>(task_graph_runner())->RunUntilIdle();
+  base::RunLoop().RunUntilIdle();
+
   // Flush all decode tasks. The tiles with checkered images should be
   // invalidated.
   FlushDecodeTasks();
   EXPECT_TRUE(host_impl()->client()->did_request_impl_side_invalidation());
   PerformImplSideInvalidation();
   for (int i = 0; i < 2; i++) {
     for (int j = 0; j < 3; j++) {
       const Tile* tile = pending_tiling->TileAt(i, j);
       if (j == 1)
         EXPECT_TRUE(tile);
       else
         EXPECT_FALSE(tile);
     }
   }
   host_impl()->client()->reset_did_request_impl_side_invalidation();
 }
 
 }  // namespace
 }  // namespace cc