Split content script injections into multiple tasks

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index a4f67e1e5346a49d35f450a620dac255b2b2bf00..431fe62a67d4f97c9d0c4a915f0f16a367bb0166 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -1407,6 +1407,14 @@ void ChromeContentRendererClient::RunScriptsAtDocumentEnd(
 #endif
 }
 
+void ChromeContentRendererClient::RunScriptsAtDocumentIdle(
+    content::RenderFrame* render_frame) {
+#if BUILDFLAG(ENABLE_EXTENSIONS)
+  ChromeExtensionsRendererClient::GetInstance()->RunScriptsAtDocumentIdle(
+      render_frame);
+#endif
+}
+
 void ChromeContentRendererClient::
     DidInitializeServiceWorkerContextOnWorkerThread(
         v8::Local<v8::Context> context,