android: Hook up switch for browser compositor borders

Bug: 841220
Change-Id: I5eab5af79cc93119e9402abb27e805c3923664ba
Reviewed-on: https://chromium-review.googlesource.com/1077090Reviewed-by: danakj <danakj@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: Bo <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562612}

content/browser/renderer_host/compositor_impl_android.cc

@@ -751,6 +751,8 @@ void CompositorImpl::CreateLayerTreeHost() {
       command_line->HasSwitch(cc::switches::kEnableGpuBenchmarking));
   settings.initial_debug_state.show_fps_counter =
       command_line->HasSwitch(cc::switches::kUIShowFPSCounter);
+  if (command_line->HasSwitch(cc::switches::kUIShowCompositedLayerBorders))
+    settings.initial_debug_state.show_debug_borders.set();
   settings.single_thread_proxy_scheduler = true;
   settings.use_painted_device_scale_factor = true;