Implement HiDPI and pinch-zoom scaling of filter params

cc/layers/delegated_renderer_layer_impl_unittest.cc

Index: cc/layers/delegated_renderer_layer_impl_unittest.cc
diff --git a/cc/layers/delegated_renderer_layer_impl_unittest.cc b/cc/layers/delegated_renderer_layer_impl_unittest.cc
index 33082cc6d2b70345e96c1f70922ea01caa6cd28a..f9133af73446091383431274f473b6f63a69d63c 100644
--- a/cc/layers/delegated_renderer_layer_impl_unittest.cc
+++ b/cc/layers/delegated_renderer_layer_impl_unittest.cc
@@ -583,6 +583,7 @@ class DelegatedRendererLayerImplTestTransform
         child_pass_rect,        // contents_changed_since_last_frame
         gfx::RectF(),           // mask_uv_rect
         FilterOperations(),     // filters
+        gfx::Vector2dF(),       // filters_scale
         FilterOperations());    // background_filters
 
     SolidColorDrawQuad* color_quad;
@@ -1019,6 +1020,7 @@ class DelegatedRendererLayerImplTestClip
         child_pass_rect,        // contents_changed_since_last_frame
         gfx::RectF(),           // mask_uv_rect
         FilterOperations(),     // filters
+        gfx::Vector2dF(),       // filters_scale
         FilterOperations());    // background_filters
 
     SolidColorDrawQuad* color_quad;