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

cc/layers/picture_image_layer_impl_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/layers/picture_image_layer_impl.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_picture_layer_tiling_client.h"
 #include "cc/test/impl_side_painting_settings.h"
+#include "cc/trees/layer_tree_impl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 namespace {
 
 class TestablePictureImageLayerImpl : public PictureImageLayerImpl {
  public:
   TestablePictureImageLayerImpl(LayerTreeImpl* tree_impl, int id)
       : PictureImageLayerImpl(tree_impl, id) {
   }
@@ skipping 12 matching lines @@
   scoped_ptr<TestablePictureImageLayerImpl> CreateLayer(int id) {
     TestablePictureImageLayerImpl* layer =
         new TestablePictureImageLayerImpl(host_impl_.pending_tree(), id);
     layer->SetBounds(gfx::Size(100, 200));
     layer->tilings_.reset(new PictureLayerTilingSet(&tiling_client_,
                                                     layer->bounds()));
     layer->pile_ = tiling_client_.pile();
     return make_scoped_ptr(layer);
   }
 
+  void UpdateDrawProperties() {
+    host_impl_.pending_tree()->UpdateDrawProperties();
+  }
+
  private:
   FakeImplProxy proxy_;
   FakeLayerTreeHostImpl host_impl_;
   FakePictureLayerTilingClient tiling_client_;
 };
 
 TEST_F(PictureImageLayerImplTest, CalculateContentsScale) {
   scoped_ptr<TestablePictureImageLayerImpl> layer(CreateLayer(1));
   layer->SetDrawsContent(true);
 
   float contents_scale_x;
   float contents_scale_y;
   gfx::Size content_bounds;
   layer->CalculateContentsScale(2.f, false,
                                 &contents_scale_x, &contents_scale_y,
                                 &content_bounds);
   EXPECT_FLOAT_EQ(1.f, contents_scale_x);
   EXPECT_FLOAT_EQ(1.f, contents_scale_y);
   EXPECT_EQ(layer->bounds(), content_bounds);
 }
 
 TEST_F(PictureImageLayerImplTest, AreVisibleResourcesReady) {
   scoped_ptr<TestablePictureImageLayerImpl> layer(CreateLayer(1));
   layer->SetBounds(gfx::Size(100, 200));
   layer->SetDrawsContent(true);
 
+  UpdateDrawProperties();
+
   float contents_scale_x;
   float contents_scale_y;
   gfx::Size content_bounds;
   layer->CalculateContentsScale(2.f, false,
                                 &contents_scale_x, &contents_scale_y,
                                 &content_bounds);
+  layer->UpdateTilePriorities();
 
   EXPECT_TRUE(layer->AreVisibleResourcesReady());
 }
 
 }  // namespace
 }  // namespace cc