Pass data saver pref value into embedded worker

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 769938ceb7ad980bf1def0aa05ef054574d692c9..7dc489a9bde75ea814fbe9c36f11040462ba51a3 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -1698,6 +1698,15 @@ const gfx::ImageSkia* ChromeContentBrowserClient::GetDefaultFavicon() {
   return rb.GetNativeImageNamed(IDR_DEFAULT_FAVICON).ToImageSkia();
 }
 
+bool ChromeContentBrowserClient::IsDataSaverEnabled(
+    content::BrowserContext* browser_context) {
+  Profile* profile = Profile::FromBrowserContext(browser_context);
+  if (!profile)
+    return false;
+  PrefService* prefs = profile->GetPrefs();
+  return prefs && prefs->GetBoolean(prefs::kDataSaverEnabled);
+}
+
 bool ChromeContentBrowserClient::AllowAppCache(
     const GURL& manifest_url,
     const GURL& first_party,