cc: Fix BytesPerPixel issue and refactor.

cc/tiles/tile_manager_unittest.cc

Index: cc/tiles/tile_manager_unittest.cc
diff --git a/cc/tiles/tile_manager_unittest.cc b/cc/tiles/tile_manager_unittest.cc
index 891d08240484126d450131f20053566046d42518..27ef65d5d32484caf31ef2dea6371f917d820a92 100644
--- a/cc/tiles/tile_manager_unittest.cc
+++ b/cc/tiles/tile_manager_unittest.cc
@@ -1386,8 +1386,8 @@ TEST_F(TileManagerTilePriorityQueueTest,
   EXPECT_EQ(RGBA_8888, host_impl_.resource_provider()->best_texture_format());
 
   ManagedMemoryPolicy policy = host_impl_.ActualManagedMemoryPolicy();
-  policy.bytes_limit_when_visible =
-      Resource::UncheckedMemorySizeBytes(gfx::Size(256, 256), RGBA_8888);
+  policy.bytes_limit_when_visible = ResourceUtil::UncheckedSizeInBytes<size_t>(
+      gfx::Size(256, 256), RGBA_8888);
   host_impl_.SetMemoryPolicy(policy);
 
   EXPECT_FALSE(host_impl_.is_likely_to_require_a_draw());