cc: Generate tilings at other scales for impl-side painting

cc/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/picture_layer_tiling_set.h"
 
 #include "cc/test/fake_picture_layer_tiling_client.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/size_conversions.h"
 
@@ skipping 11 matching lines @@
   set.AddTiling(1.0, default_tile_size);
   set.AddTiling(1.5, default_tile_size);
   set.AddTiling(2.0, default_tile_size);
 
   float contents_scale = 2.0;
   gfx::Size content_bounds(
       gfx::ToCeiledSize(gfx::ScaleSize(layer_bounds, contents_scale)));
   gfx::Rect content_rect(gfx::Point(), content_bounds);
 
   Region remaining(content_rect);
-  PictureLayerTilingSet::Iterator iter(&set, contents_scale, content_rect);
+  PictureLayerTilingSet::Iterator iter(
+      &set,
+      contents_scale,
+      content_rect,
+      contents_scale);
   for (; iter; ++iter) {
     gfx::Rect geometry_rect = iter.geometry_rect();
     EXPECT_TRUE(content_rect.Contains(geometry_rect));
     ASSERT_TRUE(remaining.Contains(geometry_rect));
     remaining.Subtract(geometry_rect);
 
     // No tiles have resources, so no iter represents a real tile.
     EXPECT_FALSE(*iter);
   }
   EXPECT_TRUE(remaining.IsEmpty());
 }
 
 }  // namespace
 }  // namespace cc