Add a way to send the resource percentage signal to the RC.

chrome/browser/page_load_metrics/page_load_metrics_initialize.h

Index: chrome/browser/page_load_metrics/page_load_metrics_initialize.h
diff --git a/chrome/browser/page_load_metrics/page_load_metrics_initialize.h b/chrome/browser/page_load_metrics/page_load_metrics_initialize.h
index 3df50d0dabae6110b662d36b5d6cac18ac4e4777..605cdd3dc6f34da4c924896fe182416cf637f39a 100644
--- a/chrome/browser/page_load_metrics/page_load_metrics_initialize.h
+++ b/chrome/browser/page_load_metrics/page_load_metrics_initialize.h
@@ -13,8 +13,8 @@ class WebContents;
 
 namespace chrome {
 
-void InitializePageLoadMetricsForWebContents(
-    content::WebContents* web_contents);
+void InitializePageLoadMetricsForWebContents(content::WebContents* web_contents,

[Charlie Harrison, 2017/05/17 23:56:24]

Can you document this bool here?

[Pete Williamson, 2017/05/24 01:01:50]

Done.

+                                             bool background_rendering);

[Bryan McQuade, 2017/05/23 05:00:01]

this name 'background_rendering' feels overly specific to be a parameter to this
function.

i'll need to look at this a bit more, but my initial reaction is we may want to
change the way this is structured a bit.

[Pete Williamson, 2017/05/24 01:01:50]

What do you think of a separate init function for just initializing the metrics
we want in background mode?

 
 }  // namespace chrome