ignore dep-graph in resolve and lower_crate

This got removed at some point, it seems.

src/librustc/hir/lowering.rs

@@ -45,6 +45,7 @@ use hir::map::Definitions;
 use hir::map::definitions::DefPathData;
 use hir::def_id::{DefIndex, DefId};
 use hir::def::{Def, PathResolution};
+use session::Session;
 
 use std::collections::BTreeMap;
 use std::iter;
@@ -97,8 +98,16 @@ impl Resolver for DummyResolver {
     }
 }
 
-pub fn lower_crate(krate: &Crate, id_assigner: &NodeIdAssigner, resolver: &mut Resolver)
+pub fn lower_crate(sess: &Session,
+                   krate: &Crate,
+                   id_assigner: &NodeIdAssigner,
+                   resolver: &mut Resolver)
                    -> hir::Crate {
+    // We're constructing the HIR here; we don't care what we will
+    // read, since we haven't even constructed the *input* to
+    // incr. comp. yet.
+    let _ignore = sess.dep_graph.in_ignore();
+
     LoweringContext {
         crate_root: if std_inject::no_core(krate) {
             None

src/librustc_driver/driver.rs

@@ -814,7 +814,7 @@ pub fn lower_and_resolve<'a>(sess: &Session,
 
         // Lower ast -> hir.
         let hir_forest = time(sess.time_passes(), "lowering ast -> hir", || {
-            hir_map::Forest::new(lower_crate(krate, sess, &mut resolver), dep_graph)
+            hir_map::Forest::new(lower_crate(sess, krate, sess, &mut resolver), dep_graph)
         });
 
         (ty::CrateAnalysis {

src/librustc_resolve/lib.rs

@@ -3624,6 +3624,7 @@ pub fn resolve_crate<'a, 'b>(resolver: &'b mut Resolver<'a>, krate: &'b Crate) {
     // reflects not just its contents but the results of name
     // resolution on those contents. Hopefully we'll push this back at
     // some point.
+    let _ignore = resolver.session.dep_graph.in_ignore();
 
     resolver.build_reduced_graph(krate);
     resolve_imports::resolve_imports(resolver);

src/librustdoc/test.rs

@@ -101,7 +101,7 @@ pub fn run(input: &str,
     let defs = hir_map::collect_definitions(&krate);
 
     let mut dummy_resolver = DummyResolver;
-    let krate = lower_crate(&krate, &sess, &mut dummy_resolver);
+    let krate = lower_crate(&sess, &krate, &sess, &mut dummy_resolver);
 
     let opts = scrape_test_config(&krate);