cc: Reset raster scale if we didn't sync high res tiling.

cc/test/fake_picture_layer_impl.h

Index: cc/test/fake_picture_layer_impl.h
diff --git a/cc/test/fake_picture_layer_impl.h b/cc/test/fake_picture_layer_impl.h
index 97cbe24210a146182cc2023c984d6b4c403bcdf7..9ce0283e9b12c8604a7404070599ffe6c9ec9ebb 100644
--- a/cc/test/fake_picture_layer_impl.h
+++ b/cc/test/fake_picture_layer_impl.h
@@ -48,6 +48,10 @@ class FakePictureLayerImpl : public PictureLayerImpl {
   using PictureLayerImpl::MinimumContentsScale;
   using PictureLayerImpl::SanityCheckTilingState;
 
+  void SetNeedsPostCommitInitialization() {
+    needs_post_commit_initialization_ = true;
+  }
+
   bool needs_post_commit_initialization() const {
     return needs_post_commit_initialization_;
   }