Delete code used to invert web content for high-contrast mode.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 1e69ac0b6d812f2dc47c708ed2d80def1da6083f..194d40c2153aa6bb397789a3184645814b226511 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -255,7 +255,6 @@ class CONTENT_EXPORT RenderWidget
   void OnMsgRepaint(const gfx::Size& size_to_paint);
   void OnSetTextDirection(WebKit::WebTextDirection direction);
   void OnGetFPS();
-  void OnInvertWebContent(bool invert);
 
   // Override points to notify derived classes that a paint has happened.
   // WillInitiatePaint happens when we're about to generate a new bitmap and
@@ -529,12 +528,6 @@ class CONTENT_EXPORT RenderWidget
   // |screen_info_| on some platforms, and defaults to 1 on other platforms.
   int device_scale_factor_;
 
-  // Set to true if we should invert all pixels.
-  bool invert_;
-
-  // The Skia paint object for inverting.
-  scoped_ptr<SkPaint> invert_paint_;
-
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };