Fix Android tab navigation "stretch" regression.

content/browser/renderer_host/render_widget_host_view_android.h

Index: content/browser/renderer_host/render_widget_host_view_android.h
diff --git a/content/browser/renderer_host/render_widget_host_view_android.h b/content/browser/renderer_host/render_widget_host_view_android.h
index 23fc926b5e14e580d8cbc85f328b786a03998fc5..780f1f24916377a10a983521781ea6e67f759c7f 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.h
+++ b/content/browser/renderer_host/render_widget_host_view_android.h
@@ -227,11 +227,6 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
 
   void WasResized();
 
-  void GetScaledContentBitmap(float scale,
-                              SkColorType preferred_color_type,
-                              gfx::Rect src_subrect,
-                              const ReadbackRequestCallback& result_callback);
-
   bool HasValidFrame() const;
 
   void MoveCaret(const gfx::Point& point);