Remove BackingStoreGtk::CairoShowRect().

content/browser/renderer_host/backing_store_gtk.cc

Index: content/browser/renderer_host/backing_store_gtk.cc
diff --git a/content/browser/renderer_host/backing_store_gtk.cc b/content/browser/renderer_host/backing_store_gtk.cc
index 595c481b06b475d555ffc108ae054b50b0d81fe8..a029fba1ce7364c1e0a6ea14ae5dd9bd6ef45c79 100644
--- a/content/browser/renderer_host/backing_store_gtk.cc
+++ b/content/browser/renderer_host/backing_store_gtk.cc
@@ -664,20 +664,6 @@ void BackingStoreGtk::XShowRect(const gfx::Point &origin,
             rect.x() + origin.x(), rect.y() + origin.y());
 }
 
-void BackingStoreGtk::CairoShowRect(const gfx::Rect& rect,
-                                    GdkDrawable* drawable) {
-  cairo_surface_t* surface = cairo_xlib_surface_create(
-      display_, pixmap_, static_cast<Visual*>(visual_),
-      size().width(), size().height());
-  cairo_t* cr = gdk_cairo_create(drawable);
-  cairo_set_source_surface(cr, surface, 0, 0);
-
-  cairo_rectangle(cr, rect.x(), rect.y(), rect.width(), rect.height());
-  cairo_fill(cr);
-  cairo_destroy(cr);
-  cairo_surface_destroy(surface);
-}
-
 #if defined(TOOLKIT_GTK)
 void BackingStoreGtk::PaintToRect(const gfx::Rect& rect, GdkDrawable* target) {
   cairo_surface_t* surface = cairo_xlib_surface_create(