use SkClipOps where we can, legacyClip where we need to rework

cc/output/software_renderer.cc

Index: cc/output/software_renderer.cc
diff --git a/cc/output/software_renderer.cc b/cc/output/software_renderer.cc
index 1b18648e115cb92efc48350704422c280b15e8ee..9543e0afea429bc18f405eb419ae8e70e37f3723 100644
--- a/cc/output/software_renderer.cc
+++ b/cc/output/software_renderer.cc
@@ -183,7 +183,8 @@ void SoftwareRenderer::SetClipRect(const gfx::Rect& rect) {
   // Skia applies the current matrix to clip rects so we reset it temporary.
   SkMatrix current_matrix = current_canvas_->getTotalMatrix();
   current_canvas_->resetMatrix();
-  current_canvas_->clipRect(gfx::RectToSkRect(rect), SkRegion::kReplace_Op);
+  current_canvas_->legacyClipRect(gfx::RectToSkRect(rect),
+                                  SkRegion::kReplace_Op);
   current_canvas_->setMatrix(current_matrix);
 }