cc: Prevent tiles that are required for activation from being placed in NEVER_BIN.

cc/resources/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 "cc/resources/tile.h"
 #include "cc/resources/tile_priority.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_output_surface_client.h"
@@ skipping 184 matching lines @@
   TileVector never_bin = CreateTiles(1, TilePriority(), TilePriority());
 
   tile_manager()->AssignMemoryToTiles(global_state_);
 
   EXPECT_EQ(3, AssignedMemoryCount(active_now));
   EXPECT_EQ(3, AssignedMemoryCount(pending_now));
   EXPECT_EQ(3, AssignedMemoryCount(active_pending_soon));
   EXPECT_EQ(0, AssignedMemoryCount(never_bin));
 }
 
+TEST_P(TileManagerTest, EnoughMemoryPendingLowResAllowAbsoluteMinimum) {
+  // A few low-res tiles required for activation, with enough memory for all
+  // tiles.
+
+  Initialize(5, ALLOW_ABSOLUTE_MINIMUM, SAME_PRIORITY_FOR_BOTH_TREES);
+  TileVector pending_low_res =
+      CreateTiles(5, TilePriority(), TilePriorityLowRes());
+
+  tile_manager()->AssignMemoryToTiles(global_state_);
+
+  EXPECT_EQ(5, AssignedMemoryCount(pending_low_res));
+}
+
 TEST_P(TileManagerTest, EnoughMemoryAllowAbsoluteMinimum) {
   // A few tiles of each type of priority, with enough memory for all tiles,
   // with the exception of never and soon bins.
 
   Initialize(10, ALLOW_ABSOLUTE_MINIMUM, SMOOTHNESS_TAKES_PRIORITY);
   TileVector active_now =
       CreateTiles(3, TilePriorityForNowBin(), TilePriority());
   TileVector pending_now =
       CreateTiles(3, TilePriority(), TilePriorityForNowBin());
   TileVector active_pending_soon =
@@ skipping 918 matching lines @@
 
     last_tile = tile;
     new_content_tiles.insert(tile);
   }
 
   EXPECT_EQ(tile_count, new_content_tiles.size());
   EXPECT_EQ(all_tiles, new_content_tiles);
 }
 }  // namespace
 }  // namespace cc