cc: Add command line flags for the various show rect debugging features.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index a29381309662dba1431f283154c2845511157261..212e1fd78aabe3e8516c08d42d3fe51783742d88 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -865,6 +865,11 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
     cc::switches::kEnablePerTilePainting,
     cc::switches::kEnablePinchInCompositor,
     cc::switches::kJankInsteadOfCheckerboard,
+    cc::switches::kShowPropertyChangedRects,
+    cc::switches::kShowSurfaceDamageRects,
+    cc::switches::kShowScreenSpaceRects,
+    cc::switches::kShowReplicaScreenSpaceRects,
+    cc::switches::kShowOccludingRects,
     cc::switches::kTraceOverdraw,
   };
   renderer_cmd->CopySwitchesFrom(browser_cmd, kSwitchNames,