cc: Use ScreenSpaceTransform to determine content scale

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 "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/quads/draw_quad.h"
@@ skipping 70 matching lines @@
 
   void SetupDrawPropertiesAndUpdateTiles(TestablePictureImageLayerImpl* layer,
                                          float ideal_contents_scale,
                                          float device_scale_factor,
                                          float page_scale_factor,
                                          float maximum_animation_contents_scale,
                                          bool animating_transform_to_screen,
                                          gfx::Rect viewport_rect) {
     gfx::Transform scale_transform;
     scale_transform.Scale(ideal_contents_scale, ideal_contents_scale);
-    layer->draw_properties().target_space_transform = scale_transform;
+    layer->draw_properties().screen_space_transform = scale_transform;
     layer->set_is_drawn_render_surface_layer_list_member(true);
     DCHECK_EQ(layer->GetIdealContentsScale(), ideal_contents_scale);
     layer->draw_properties().maximum_animation_contents_scale =
         maximum_animation_contents_scale;
     layer->draw_properties().screen_space_transform_is_animating =
         animating_transform_to_screen;
     layer->draw_properties().visible_layer_rect = viewport_rect;
     layer->UpdateTiles();
   }
 
@@ skipping 71 matching lines @@
   active_layer->DidDraw(nullptr);
 
   EXPECT_EQ(DrawQuad::TILED_CONTENT, render_pass->quad_list.front()->material);
 
   // Tiles are ready at correct scale, so should not set had_incomplete_tile.
   EXPECT_EQ(0, data.num_incomplete_tiles);
 }
 
 }  // namespace
 }  // namespace cc