Add flag for drawing layers to screen with Ganesh

cc/debug/debug_colors.cc

Index: cc/debug/debug_colors.cc
diff --git a/cc/debug/debug_colors.cc b/cc/debug/debug_colors.cc
index 00b1e07a5fc36becff2f39dff9f9e636fac2678a..4afc31320b79217da2b1f60d4478caffd6b6ce50 100644
--- a/cc/debug/debug_colors.cc
+++ b/cc/debug/debug_colors.cc
@@ -129,8 +129,20 @@ int DebugColors::SolidColorTileBorderWidth(const LayerTreeImpl* tree_impl) {
 }
 
 // Picture tile borders are dark grey.
-SkColor DebugColors::PictureTileBorderColor() { return SkColorSetARGB(64, 64, 64, 0); }
-int DebugColors::PictureTileBorderWidth(const LayerTreeImpl* tree_impl) { return Scale(1, tree_impl); }
+SkColor DebugColors::PictureTileBorderColor() {
+  return SkColorSetARGB(64, 64, 64, 0);
+}
+int DebugColors::PictureTileBorderWidth(const LayerTreeImpl* tree_impl) {
+  return Scale(1, tree_impl);
+}
+
+// Direct picture tile borders are chartreuse
+SkColor DebugColors::DirectPictureTileBorderColor() {
+  return SkColorSetARGB(255, 127, 255, 0);
+}
+int DebugColors::DirectPictureTileBorderWidth(const LayerTreeImpl* tree_impl) {
+  return Scale(1, tree_impl);
+}
 
 // ======= Checkerboard colors =======