cc: Make the PictureLayerImpl raster source null until commit.

cc/trees/layer_tree_host_impl_unittest.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
@@ skipping 7776 matching lines @@
   host_impl_->Animate(start_time + base::TimeDelta::FromMilliseconds(250));
   host_impl_->UpdateAnimationState(true);
 
   EXPECT_VECTOR_EQ(gfx::ScrollOffset(0, 100),
                    scrolling_layer->TotalScrollOffset());
   EXPECT_EQ(NULL, host_impl_->CurrentlyScrollingLayer());
 }
 
 TEST_F(LayerTreeHostImplTest, GetPictureLayerImplPairs) {
   host_impl_->CreatePendingTree();
-  host_impl_->pending_tree()->SetRootLayer(
-      PictureLayerImpl::Create(host_impl_->pending_tree(), 10, false));
+
+  scoped_ptr<PictureLayerImpl> layer =
+      PictureLayerImpl::Create(host_impl_->pending_tree(), 10, false);
+  layer->SetBounds(gfx::Size(10, 10));
+
+  scoped_refptr<RasterSource> pile(FakePicturePileImpl::CreateEmptyPile(
+      gfx::Size(10, 10), gfx::Size(10, 10)));
+  Region empty_invalidation;
+  const PictureLayerTilingSet* null_tiling_set = nullptr;
+  layer->UpdateRasterSource(pile, &empty_invalidation, null_tiling_set);
+
+  host_impl_->pending_tree()->SetRootLayer(layer.Pass());
 
   LayerTreeImpl* pending_tree = host_impl_->pending_tree();
   LayerImpl* pending_layer = pending_tree->root_layer();
 
   std::vector<PictureLayerImpl::Pair> layer_pairs;
   host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
   EXPECT_EQ(1u, layer_pairs.size());
   EXPECT_EQ(pending_layer, layer_pairs[0].pending);
   EXPECT_EQ(nullptr, layer_pairs[0].active);
 
@@ skipping 146 matching lines @@
   // surface.
   EXPECT_EQ(0, num_lost_surfaces_);
   host_impl_->DidLoseOutputSurface();
   EXPECT_EQ(1, num_lost_surfaces_);
   host_impl_->DidLoseOutputSurface();
   EXPECT_LE(1, num_lost_surfaces_);
 }
 
 }  // namespace
 }  // namespace cc