Minor simplification and cleanup of graph builder.

src/compiler/graph-builder.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_GRAPH_BUILDER_H_
 #define V8_COMPILER_GRAPH_BUILDER_H_
 
 #include "src/v8.h"
 
 #include "src/allocation.h"
@@ skipping 91 matching lines @@
  protected:
   class Environment;
   friend class ControlBuilder;
 
   // The following method creates a new node having the specified operator and
   // ensures effect and control dependencies are wired up. The dependencies
   // tracked by the environment might be mutated.
   virtual Node* MakeNode(Operator* op, int value_input_count,
                          Node** value_inputs);
 
-  Environment* environment_internal() const { return environment_; }
+  Environment* environment() const { return environment_; }
   void set_environment(Environment* env) { environment_ = env; }
 
   Node* current_context() const { return current_context_; }
   void set_current_context(Node* context) { current_context_ = context; }
 
   Node* exit_control() const { return exit_control_; }
   void set_exit_control(Node* node) { exit_control_ = node; }
 
   Node* dead_control();
 
   // TODO(mstarzinger): Use phase-local zone instead!
   Zone* zone() const { return graph()->zone(); }
   Isolate* isolate() const { return zone()->isolate(); }
   CommonOperatorBuilder* common() const { return common_; }
 
   // Helper to wrap a Handle<T> into a Unique<T>.
   template <class T>
   PrintableUnique<T> MakeUnique(Handle<T> object) {
     return PrintableUnique<T>::CreateUninitialized(zone(), object);
   }
 
   // Support for control flow builders. The concrete type of the environment
   // depends on the graph builder, but environments themselves are not virtual.
   virtual Environment* CopyEnvironment(Environment* env);
 
-  // Helper when creating node that depends on control.
-  Node* GetControlDependency();
-
-  // Helper when creating node that updates control.
-  void UpdateControlDependency(Node* new_control);
-
   // Helper to indicate a node exits the function body.
   void UpdateControlDependencyToLeaveFunction(Node* exit);
 
  private:
   CommonOperatorBuilder* common_;
   Environment* environment_;
 
   // Node representing the control dependency for dead code.
   SetOncePointer<Node> dead_control_;
 
@@ skipping 69 matching lines @@
   StructuredGraphBuilder* builder_;
   Node* control_dependency_;
   Node* effect_dependency_;
   NodeVector values_;
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_GRAPH_BUILDER_H__