Consolidate ShouldUseNativeFrame/AlwaysUseNativeFrame/UseNativeFrame spaghetti.

views/window/window.h

Index: views/window/window.h
===================================================================
--- views/window/window.h	(revision 85647)
+++ views/window/window.h	(working copy)
@@ -52,6 +52,12 @@
     Widget::InitParams widget_init_params;
   };
 
+  enum FrameType {
+    FRAME_TYPE_DEFAULT,         // Use whatever the default would be.
+    FRAME_TYPE_FORCE_CUSTOM,    // Force the custom frame.
+    FRAME_TYPE_FORCE_NATIVE     // Force the native frame.
+  };
+
   Window();
   virtual ~Window();
 
@@ -162,9 +168,16 @@
   // Retrieves the Window's native window handle.
   gfx::NativeWindow GetNativeWindow() const;
 
+  void set_frame_type(FrameType frame_type) { frame_type_ = frame_type; }
+  FrameType frame_type() const { return frame_type_; }
+
   // Whether we should be using a native frame.
   bool ShouldUseNativeFrame() const;
 
+  // Forces the frame into the alternate frame type (custom or native) depending
+  // on its current state.
+  void DebugToggleFrameType();
+
   // Tell the window that something caused the frame type to change.
   void FrameTypeChanged();
 
@@ -201,7 +214,6 @@
   virtual void EnableInactiveRendering() OVERRIDE;
   virtual bool IsModal() const OVERRIDE;
   virtual bool IsDialogBox() const OVERRIDE;
-  virtual bool IsUsingNativeFrame() const OVERRIDE;
   virtual gfx::Size GetMinimumSize() const OVERRIDE;
   virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE;
   virtual bool ExecuteCommand(int command_id) OVERRIDE;
@@ -248,6 +260,10 @@
   // Set to true if the window is in the process of closing .
   bool window_closed_;
 
+  // The current frame type in use by this window. Defaults to
+  // FRAME_TYPE_DEFAULT.
+  FrameType frame_type_;
+
   DISALLOW_COPY_AND_ASSIGN(Window);
 };