Remove dump_line_box_trees and debug_render_tree from LayoutDumpFlags.

content/shell/renderer/layout_test/blink_test_runner.cc

Index: content/shell/renderer/layout_test/blink_test_runner.cc
diff --git a/content/shell/renderer/layout_test/blink_test_runner.cc b/content/shell/renderer/layout_test/blink_test_runner.cc
index 6bc6ad435fec5abb55b280447ed5f99b95955ae4..633757842fe40e980814f120ba42c669c4928c01 100644
--- a/content/shell/renderer/layout_test/blink_test_runner.cc
+++ b/content/shell/renderer/layout_test/blink_test_runner.cc
@@ -889,12 +889,8 @@ void BlinkTestRunner::CaptureDump() {
     return;
   }
 
-  test_runner::LayoutDumpFlags layout_dump_flags =
+  const test_runner::LayoutDumpFlags& layout_dump_flags =
       interfaces->TestRunner()->GetLayoutDumpFlags();
-  layout_dump_flags.dump_line_box_trees =
-      base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kDumpLineBoxTrees);
-
   if (!layout_dump_flags.dump_child_frames()) {
     std::string layout_dump = DumpLayout(
         render_view()->GetMainRenderFrame()->GetWebFrame(), layout_dump_flags);