Snackbar for promoting Data Saver to existing users

chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.cc

Index: chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.cc
diff --git a/chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.cc b/chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.cc
index baa6931723e75473f45fdf9683b738ce75f9f4e9..8043133068448d147048c18bfff9155cd9967112 100644
--- a/chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.cc
+++ b/chrome/browser/net/spdyproxy/data_reduction_proxy_settings_android.cc
@@ -116,6 +116,13 @@ DataReductionProxySettingsAndroid::GetContentLengths(
                                     received_content_length);
 }
 
+jlong DataReductionProxySettingsAndroid::GetTotalHttpContentLengthSaved(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj) {
+  return Settings()->GetHttpOriginalContentLength() -

[tbansal1, 2016/10/25 18:10:04]

If only saved bytes are needed, then is it possible to just expose that from
settings?

[megjablon, 2016/10/25 22:14:19]

I implemented it this way so it was clear what content length saved meant.
Changed so this is passed from settings though. 

+         Settings()->GetHttpReceivedContentLength();
+}
+
 ScopedJavaLocalRef<jlongArray>
 DataReductionProxySettingsAndroid::GetDailyOriginalContentLengths(
     JNIEnv* env,