cc: Fix impl-side painting flashing due to missing tiles

cc/resources/picture_layer_tiling_set_unittest.cc

 // Copyright 2012 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/picture_layer_tiling_set.h"
 
 #include <vector>
 
 #include "cc/resources/resource_pool.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_picture_layer_tiling_client.h"
 #include "cc/test/fake_tile_manager_client.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/size_conversions.h"
 
 namespace cc {
 namespace {
 
 TEST(PictureLayerTilingSetTest, NoResources) {
   FakePictureLayerTilingClient client;
   gfx::Size layer_bounds(1000, 800);
   PictureLayerTilingSet set(&client, layer_bounds);
   client.SetTileSize(gfx::Size(256, 256));
 
-  set.AddTiling(1.0);
-  set.AddTiling(1.5);
-  set.AddTiling(2.0);
+  set.AddTiling(1.0)->CreateAllTilesForTesting();
+  set.AddTiling(1.5)->CreateAllTilesForTesting();
+  set.AddTiling(2.0)->CreateAllTilesForTesting();
 
   float contents_scale = 2.0;
   gfx::Size content_bounds(
       gfx::ToCeiledSize(gfx::ScaleSize(layer_bounds, contents_scale)));
   gfx::Rect content_rect(content_bounds);
 
   Region remaining(content_rect);
   PictureLayerTilingSet::CoverageIterator iter(
       &set,
       contents_scale,
@@ skipping 104 matching lines @@
 TEST_F(PictureLayerTilingSetTestWithResources, ManyTilings_Equal) {
   runTest(10, 1.f, 1.f, 5.f, 5.f);
 }
 
 TEST_F(PictureLayerTilingSetTestWithResources, ManyTilings_NotEqual) {
   runTest(10, 1.f, 1.f, 4.5f, 5.f);
 }
 
 }  // namespace
 }  // namespace cc