cc: Make the PictureLayerImpl raster source null until commit.

cc/quads/draw_quad_unittest.cc

Index: cc/quads/draw_quad_unittest.cc
diff --git a/cc/quads/draw_quad_unittest.cc b/cc/quads/draw_quad_unittest.cc
index e65b3264259035ea1c72a510f2e32a13b752897a..d15b89312902c87cfae532bfd9061f05e5af3054 100644
--- a/cc/quads/draw_quad_unittest.cc
+++ b/cc/quads/draw_quad_unittest.cc
@@ -23,7 +23,7 @@
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/quads/tile_draw_quad.h"
 #include "cc/quads/yuv_video_draw_quad.h"
-#include "cc/resources/picture_pile_impl.h"
+#include "cc/test/fake_picture_pile_impl.h"
 #include "cc/test/geometry_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/effects/SkBlurImageFilter.h"
@@ -683,7 +683,9 @@ TEST(DrawQuadTest, CopyPictureDrawQuad) {
   ResourceFormat texture_format = RGBA_8888;
   gfx::Rect content_rect(30, 40, 20, 30);
   float contents_scale = 3.141592f;
-  scoped_refptr<RasterSource> raster_source = PicturePileImpl::Create();
+  scoped_refptr<RasterSource> raster_source =
+      FakePicturePileImpl::CreateEmptyPile(gfx::Size(100, 100),
+                                           gfx::Size(100, 100));
   CREATE_SHARED_STATE();
 
   CREATE_QUAD_8_NEW(PictureDrawQuad, opaque_rect, visible_rect, tex_coord_rect,
@@ -927,7 +929,9 @@ TEST_F(DrawQuadIteratorTest, DISABLED_PictureDrawQuad) {
   ResourceFormat texture_format = RGBA_8888;
   gfx::Rect content_rect(30, 40, 20, 30);
   float contents_scale = 3.141592f;
-  scoped_refptr<PicturePileImpl> raster_source = PicturePileImpl::Create();
+  scoped_refptr<RasterSource> raster_source =
+      FakePicturePileImpl::CreateEmptyPile(gfx::Size(100, 100),
+                                           gfx::Size(100, 100));
 
   CREATE_SHARED_STATE();
   CREATE_QUAD_8_NEW(PictureDrawQuad, opaque_rect, visible_rect, tex_coord_rect,