aw: Fix setting background color

android_webview/browser/renderer_host/aw_render_view_host_ext.cc

Index: android_webview/browser/renderer_host/aw_render_view_host_ext.cc
diff --git a/android_webview/browser/renderer_host/aw_render_view_host_ext.cc b/android_webview/browser/renderer_host/aw_render_view_host_ext.cc
index 6e227288ccae27c6028e0b0bb89223b7d8ec9f21..090541d7c044eee6cba7cac6f4696b8bdcdd1331 100644
--- a/android_webview/browser/renderer_host/aw_render_view_host_ext.cc
+++ b/android_webview/browser/renderer_host/aw_render_view_host_ext.cc
@@ -120,8 +120,8 @@ void AwRenderViewHostExt::SmoothScroll(int target_x,
 
 void AwRenderViewHostExt::RenderViewCreated(
     content::RenderViewHost* render_view_host) {
-  Send(new AwViewMsg_SetBackgroundColor(web_contents()->GetRoutingID(),
-                                        background_color_));
+  Send(new AwViewMsg_SetBackgroundColor(
+      web_contents()->GetMainFrame()->GetRoutingID(), background_color_));
 }
 
 void AwRenderViewHostExt::RenderProcessGone(base::TerminationStatus status) {