Expose the capturePicture feature in RenderView for Android WebView legacy API support.

webkit/compositor_bindings/web_layer_tree_view_impl.cc

Index: webkit/compositor_bindings/web_layer_tree_view_impl.cc
diff --git a/webkit/compositor_bindings/web_layer_tree_view_impl.cc b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
index e42a3c7696331bf47a8da012a6b1f72fab3371ae..14793d7eac722bbb9767c5d102dfdc558d999cf9 100644
--- a/webkit/compositor_bindings/web_layer_tree_view_impl.cc
+++ b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
@@ -57,6 +57,10 @@ bool WebLayerTreeViewImpl::initialize(const WebLayerTreeView::Settings& webSetti
     return true;
 }
 
+skia::RefPtr<SkPicture> WebLayerTreeViewImpl::capturePicture() {
+  return m_layerTreeHost->capturePicture();
+}
+
 void WebLayerTreeViewImpl::setSurfaceReady()
 {
     m_layerTreeHost->setSurfaceReady();