Remove support for "loads and stores to global vars through property cell shortcuts inst…

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index fd7f5e6b93a00d2867f4a00f3d40b905038e250b..5e242858891276a12a4a43fe53e544169b8d20d1 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -5716,16 +5716,6 @@ void HOptimizedGraphBuilder::VisitVariableProxy(VariableProxy* expr) {
           instr->SetDependsOnFlag(kGlobalVars);
           return ast_context()->ReturnInstruction(instr, expr->id());
         }
-      } else if (variable->IsGlobalSlot()) {
-        DCHECK(variable->index() > 0);
-        DCHECK(variable->IsStaticGlobalObjectProperty());
-        int slot_index = variable->index();
-        int depth = scope()->ContextChainLength(variable->scope());
-
-        HLoadGlobalViaContext* instr =
-            New<HLoadGlobalViaContext>(depth, slot_index);
-        return ast_context()->ReturnInstruction(instr, expr->id());
-
       } else {
         HValue* global_object = Add<HLoadNamedField>(
             context(), nullptr,
@@ -6941,18 +6931,6 @@ void HOptimizedGraphBuilder::HandleGlobalVariableAssignment(
     if (instr->HasObservableSideEffects()) {
       Add<HSimulate>(ast_id, REMOVABLE_SIMULATE);
     }
-  } else if (var->IsGlobalSlot()) {
-    DCHECK(var->index() > 0);
-    DCHECK(var->IsStaticGlobalObjectProperty());
-    int slot_index = var->index();
-    int depth = scope()->ContextChainLength(var->scope());
-
-    HStoreGlobalViaContext* instr = Add<HStoreGlobalViaContext>(
-        value, depth, slot_index, function_language_mode());
-    USE(instr);
-    DCHECK(instr->HasObservableSideEffects());
-    Add<HSimulate>(ast_id, REMOVABLE_SIMULATE);
-
   } else {
     HValue* global_object = Add<HLoadNamedField>(
         context(), nullptr,