Revert of Implement NativeViewHostAura::InstallClip.

ui/views/controls/native/native_view_host_aura.h

Index: ui/views/controls/native/native_view_host_aura.h
diff --git a/ui/views/controls/native/native_view_host_aura.h b/ui/views/controls/native/native_view_host_aura.h
index 3d32374d0350a7a99deafc702af01aac90665734..8ef4e455f3dc414c2e485eef28c3ca92a5feafc2 100644
--- a/ui/views/controls/native/native_view_host_aura.h
+++ b/ui/views/controls/native/native_view_host_aura.h
@@ -7,7 +7,6 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "ui/aura/window.h"
 #include "ui/aura/window_observer.h"
 #include "ui/views/controls/native/native_view_host_wrapper.h"
 #include "ui/views/views_export.h"
@@ -24,7 +23,7 @@
   virtual ~NativeViewHostAura();
 
   // Overridden from NativeViewHostWrapper:
-  virtual void AttachNativeView() OVERRIDE;
+  virtual void NativeViewWillAttach() OVERRIDE;
   virtual void NativeViewDetaching(bool destroyed) OVERRIDE;
   virtual void AddedToWidget() OVERRIDE;
   virtual void RemovedFromWidget() OVERRIDE;
@@ -38,27 +37,14 @@
   virtual gfx::NativeCursor GetCursor(int x, int y) OVERRIDE;
 
  private:
-  friend class NativeViewHostAuraTest;
-
   // Overridden from aura::WindowObserver:
   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
-
-  // Reparents the native view with the clipping window existing between it and
-  // its old parent, so that the fast resize path works.
-  void AddClippingWindow();
-
-  // If the native view has been reparented via AddClippingWindow, this call
-  // undoes it.
-  void RemoveClippingWindow();
 
   // Our associated NativeViewHost.
   NativeViewHost* host_;
 
-  // Window that exists between the native view and the parent that allows for
-  // clipping to occur. This is positioned in the coordinate space of
-  // host_->GetWidget().
-  aura::Window clipping_window_;
-  scoped_ptr<gfx::Rect> clip_rect_;
+  // Have we installed a clip region?
+  bool installed_clip_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewHostAura);
 };