Add flag for drawing layers to screen with Ganesh

ui/gfx/skia_util.cc

Index: ui/gfx/skia_util.cc
diff --git a/ui/gfx/skia_util.cc b/ui/gfx/skia_util.cc
index 162a5ba6bf25f35af7ae53da4c83b92f8e22efc0..50092ab13b6d1cace96df9e0af6eff2379d27bf0 100644
--- a/ui/gfx/skia_util.cc
+++ b/ui/gfx/skia_util.cc
@@ -15,6 +15,7 @@
 #include "ui/gfx/rect.h"
 #include "ui/gfx/rect_f.h"
 #include "ui/gfx/shadow_value.h"
+#include "ui/gfx/transform.h"
 
 namespace gfx {
 
@@ -46,6 +47,19 @@ RectF SkRectToRectF(const SkRect& rect) {
                SkScalarToFloat(rect.height()));
 }
 
+void TransformToFlattenedSkMatrix(const gfx::Transform& transform,
+                                  SkMatrix* flattened) {
+  // Convert from 4x4 to 3x3 by dropping the third row and column.
+  flattened->set(0, SkDoubleToScalar(transform.matrix().getDouble(0, 0)));
+  flattened->set(1, SkDoubleToScalar(transform.matrix().getDouble(0, 1)));
+  flattened->set(2, SkDoubleToScalar(transform.matrix().getDouble(0, 3)));
+  flattened->set(3, SkDoubleToScalar(transform.matrix().getDouble(1, 0)));
+  flattened->set(4, SkDoubleToScalar(transform.matrix().getDouble(1, 1)));
+  flattened->set(5, SkDoubleToScalar(transform.matrix().getDouble(1, 3)));
+  flattened->set(6, SkDoubleToScalar(transform.matrix().getDouble(3, 0)));
+  flattened->set(7, SkDoubleToScalar(transform.matrix().getDouble(3, 1)));
+  flattened->set(8, SkDoubleToScalar(transform.matrix().getDouble(3, 3)));
+}
 
 skia::RefPtr<SkShader> CreateImageRepShader(const gfx::ImageSkiaRep& image_rep,
                                             SkShader::TileMode tile_mode,