Remove unused class WebNinePatchLayerImpl.

cc/blink/web_compositor_support_impl.cc

Index: cc/blink/web_compositor_support_impl.cc
diff --git a/cc/blink/web_compositor_support_impl.cc b/cc/blink/web_compositor_support_impl.cc
index 13a868d7ebfa293942cd48bca1855db520b6d7f7..aabf7bff94f65dbad7fbd7aa12bc39d814e1face 100644
--- a/cc/blink/web_compositor_support_impl.cc
+++ b/cc/blink/web_compositor_support_impl.cc
@@ -17,7 +17,6 @@
 #include "cc/blink/web_float_animation_curve_impl.h"
 #include "cc/blink/web_image_layer_impl.h"
 #include "cc/blink/web_layer_impl.h"
-#include "cc/blink/web_nine_patch_layer_impl.h"
 #include "cc/blink/web_scroll_offset_animation_curve_impl.h"
 #include "cc/blink/web_scrollbar_layer_impl.h"
 #include "cc/blink/web_transform_animation_curve_impl.h"
@@ -38,7 +37,6 @@ using blink::WebFilterAnimationCurve;
 using blink::WebFilterOperations;
 using blink::WebFloatAnimationCurve;
 using blink::WebImageLayer;
-using blink::WebNinePatchLayer;
 using blink::WebLayer;
 using blink::WebScrollbar;
 using blink::WebScrollbarLayer;
@@ -74,10 +72,6 @@ blink::WebImageLayer* WebCompositorSupportImpl::createImageLayer() {
   return new WebImageLayerImpl();
 }
 
-blink::WebNinePatchLayer* WebCompositorSupportImpl::createNinePatchLayer() {
-  return new WebNinePatchLayerImpl();
-}
-
 WebScrollbarLayer* WebCompositorSupportImpl::createScrollbarLayer(
     WebScrollbar* scrollbar,
     WebScrollbarThemePainter painter,