Revert of [turbofan] Various fixes to allow unboxed doubles as arguments in registers...

test/cctest/compiler/graph-builder-tester.h

Index: test/cctest/compiler/graph-builder-tester.h
diff --git a/test/cctest/compiler/graph-builder-tester.h b/test/cctest/compiler/graph-builder-tester.h
index 41c1e384be72f646bd9e331c8e56ac5080373287..7432957c0e04010c89528c83a6075a90c5215dc9 100644
--- a/test/cctest/compiler/graph-builder-tester.h
+++ b/test/cctest/compiler/graph-builder-tester.h
@@ -28,12 +28,6 @@
         main_machine_(zone),
         main_simplified_(zone) {}
 
-  Graph* graph() const { return main_graph_; }
-  Zone* zone() const { return graph()->zone(); }
-  CommonOperatorBuilder* common() { return &main_common_; }
-  MachineOperatorBuilder* machine() { return &main_machine_; }
-  SimplifiedOperatorBuilder* simplified() { return &main_simplified_; }
-
  protected:
   // Prefixed with main_ to avoid naming conflicts.
   Graph* main_graph_;
@@ -45,7 +39,7 @@
 
 template <typename ReturnType>
 class GraphBuilderTester : public HandleAndZoneScope,
-                           public GraphAndBuilders,
+                           private GraphAndBuilders,
                            public CallHelper<ReturnType> {
  public:
   explicit GraphBuilderTester(MachineType p0 = kMachNone,
@@ -73,7 +67,12 @@
   }
 
   Isolate* isolate() { return main_isolate(); }
+  Graph* graph() const { return main_graph_; }
+  Zone* zone() const { return graph()->zone(); }
   Factory* factory() { return isolate()->factory(); }
+  CommonOperatorBuilder* common() { return &main_common_; }
+  MachineOperatorBuilder* machine() { return &main_machine_; }
+  SimplifiedOperatorBuilder* simplified() { return &main_simplified_; }
 
   // Initialize graph and builder.
   void Begin(int num_parameters) {