Revert of Fix bad scaling in TiledLayer

cc/test/tiled_layer_test_common.cc

Index: cc/test/tiled_layer_test_common.cc
diff --git a/cc/test/tiled_layer_test_common.cc b/cc/test/tiled_layer_test_common.cc
index 029eccde1ad9288ab083ce26f99d026476daef8b..3024cbd506a31638cbd52940c0bbf3e516af7b71 100644
--- a/cc/test/tiled_layer_test_common.cc
+++ b/cc/test/tiled_layer_test_common.cc
@@ -29,20 +29,16 @@
   layer_->Update();
 }
 
-FakeLayerUpdater::FakeLayerUpdater()
-    : prepare_count_(0), update_count_(0), last_contents_width_scale_(0.f) {
-}
+FakeLayerUpdater::FakeLayerUpdater() : prepare_count_(0), update_count_(0) {}
 
 FakeLayerUpdater::~FakeLayerUpdater() {}
 
-void FakeLayerUpdater::PrepareToUpdate(const gfx::Size& content_size,
-                                       const gfx::Rect& paint_rect,
+void FakeLayerUpdater::PrepareToUpdate(const gfx::Rect& content_rect,
                                        const gfx::Size& tile_size,
                                        float contents_width_scale,
                                        float contents_height_scale) {
   prepare_count_++;
-  last_update_rect_ = paint_rect;
-  last_contents_width_scale_ = contents_width_scale;
+  last_update_rect_ = content_rect;
   if (!rect_to_invalidate_.IsEmpty()) {
     layer_->InvalidateContentRect(rect_to_invalidate_);
     rect_to_invalidate_ = gfx::Rect();