Snackbar for promoting Data Saver to existing users

chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java

Index: chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java b/chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java
index 36192137cbf5ddd779c64c87ba7c44e6fd6ac451..74908420f7e37cf29841478a792a439e2341d885 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/net/spdyproxy/DataReductionProxySettings.java
@@ -13,6 +13,7 @@ import org.chromium.base.ContextUtils;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
+import org.chromium.chrome.browser.UrlConstants;
 
 import java.text.NumberFormat;
 import java.util.HashMap;
@@ -135,6 +136,12 @@ public class DataReductionProxySettings {
         return nativeIsDataReductionProxyPromoAllowed(mNativeDataReductionProxySettings);
     }
 
+    /** Returns true if the snackbar promo is allowed to be shown. */
+    public boolean isSnackbarPromoAllowed(String url) {
+        return url.startsWith(UrlConstants.HTTP_SCHEME) && isDataReductionProxyEnabled()
+                && isDataReductionProxyPromoAllowed();
+    }
+
     /**
      * Sets the preference on whether to enable/disable the SPDY proxy. This will zero out the
      * data reduction statistics if this is the first time the SPDY proxy has been enabled.
@@ -204,6 +211,14 @@ public class DataReductionProxySettings {
     }
 
     /**
+     * Returns the total HTTP content length saved.
+     * @return The HTTP content length saved.
+     */
+    public long getTotalHttpContentLengthSaved() {
+        return nativeGetTotalHttpContentLengthSaved(mNativeDataReductionProxySettings);
+    }
+
+    /**
      * Retrieves the history of daily totals of bytes that would have been
      * received if no data reducing mechanism had been applied.
      * @return The history of daily totals
@@ -309,6 +324,8 @@ public class DataReductionProxySettings {
             long nativeDataReductionProxySettingsAndroid);
     private native ContentLengths nativeGetContentLengths(
             long nativeDataReductionProxySettingsAndroid);
+    private native long nativeGetTotalHttpContentLengthSaved(
+            long nativeDataReductionProxySettingsAndroid);
     private native long[] nativeGetDailyOriginalContentLengths(
             long nativeDataReductionProxySettingsAndroid);
     private native long[] nativeGetDailyReceivedContentLengths(