cc: Remove all traces of SkPicture cloning.

cc/resources/picture_pile_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 <map>
 #include <utility>
 
 #include "cc/resources/picture_pile.h"
 #include "cc/test/fake_content_layer_client.h"
 #include "cc/test/fake_rendering_stats_instrumentation.h"
@@ skipping 110 matching lines @@
 
   EXPECT_EQ(1, pile_->tiling().num_tiles_x());
   EXPECT_EQ(1, pile_->tiling().num_tiles_y());
 
   TestPicturePile::PictureInfo& picture_info =
       pile_->picture_map().find(TestPicturePile::PictureMapKey(0, 0))->second;
   EXPECT_TRUE(!!picture_info.GetPicture());
 
   int expected_inflation = pile_->buffer_pixels();
 
-  Picture* base_picture = picture_info.GetPicture();
+  const Picture* base_picture = picture_info.GetPicture();
   gfx::Rect base_picture_rect(pile_->tiling_size());
   base_picture_rect.Inset(-expected_inflation, -expected_inflation);
   EXPECT_EQ(base_picture_rect.ToString(),
             base_picture->LayerRect().ToString());
 }
 
 TEST_F(PicturePileTest, InvalidateOnTileBoundaryInflated) {
   gfx::Size new_tiling_size =
       gfx::ToCeiledSize(gfx::ScaleSize(pile_->tiling_size(), 2.f));
   // This creates initial pictures.
@@ skipping 856 matching lines @@
     }
   }
 
   // No invalidation when shrinking.
   EXPECT_EQ(Region().ToString(), invalidation.ToString());
   invalidation.Clear();
 }
 
 }  // namespace
 }  // namespace cc