Implement renderer importance API for WebView

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 6f3c7f85dd179967a05477702d74ebea64419e42..2bd939803068b8ec26fe36b29c3b9520917c1ab4 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -2806,6 +2806,11 @@ void RenderProcessHostImpl::UpdateProcessPriority() {
     return;
   }
 
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableRendererPriorityManagement)) {
+    return;
+  }
+
   // We background a process as soon as it hosts no active audio streams and no
   // visible widgets -- the callers must call this function whenever we
   // transition in/out of those states.