Create a new Data Saver settings page that adds the site breakdown

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 eea40ce16a06b4f3a4b579ff86ec785097ea2183..b4f4b1b4036e2de5d268e33e704a5e26d596a386 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
@@ -14,9 +14,14 @@ import org.chromium.base.ThreadUtils;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.browser.preferences.datareduction.DataReductionDataUseItem;
+import org.chromium.chrome.browser.preferences.datareduction.DataReductionPromoUtils;
+import org.chromium.chrome.browser.preferences.datareduction.DataReductionSiteBreakdownView;
 
 import java.text.NumberFormat;
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 
@@ -63,6 +68,8 @@ public class DataReductionProxySettings {
 
     private static final String WEBLITE_QUERY_PARAM = "lite_url";
 
+    private DataReductionSiteBreakdownView mDataReductionBreakdownView;
+
     /**
      * Returns whether the data reduction proxy is enabled.
      *
@@ -166,6 +173,16 @@ public class DataReductionProxySettings {
     }
 
     /**
+     * Clears all data saving statistics.
+     */
+    public void clearDataSavingStatistics() {
+        // When the data saving statistics are cleared, reset the snackbar promo that tells the user
+        // how much data they have saved using Data Saver so far.
+        DataReductionPromoUtils.saveSnackbarPromoDisplayed(0);
+        nativeClearDataSavingStatistics(mNativeDataReductionProxySettings);
+    }
+
+    /**
      * Returns aggregate original and received content lengths.
      * @return The content lengths.
      */
@@ -265,6 +282,27 @@ public class DataReductionProxySettings {
         return nativeAreLoFiPreviewsEnabled(mNativeDataReductionProxySettings);
     }
 
+    public void queryDataUsage(

[Theresa, 2017/04/03 15:05:20]

nit: JavaDoc

[megjablon, 2017/04/03 20:33:44]

Done.

+            DataReductionSiteBreakdownView dataReductionBreakdownView, int numDays) {

[Theresa, 2017/04/03 15:05:20]

Instead of passing the view directly, I suggest using a
"Callback<List<DataReductionDataUseItem>> queryDataUsageCallback".

[megjablon, 2017/04/03 20:33:44]

Done.

+        mDataReductionBreakdownView = dataReductionBreakdownView;
+        nativeQueryDataUsage(mNativeDataReductionProxySettings,
+                new ArrayList<DataReductionDataUseItem>(), numDays);
+    }
+
+    @CalledByNative
+    public static void createDataUseItemAndAddToList(List<DataReductionDataUseItem> items,
+            String hostname, long dataUsed, long originalSize) {
+        items.add(new DataReductionDataUseItem(hostname, dataUsed, originalSize));
+    }
+
+    @CalledByNative
+    public void onQueryDataUsageComplete(List<DataReductionDataUseItem> items) {
+        if (mDataReductionBreakdownView != null) {
+            mDataReductionBreakdownView.onQueryDataUsageComplete(items);
+        }
+        mDataReductionBreakdownView = null;
+    }
+
     private native long nativeInit();
     private native boolean nativeIsDataReductionProxyPromoAllowed(
             long nativeDataReductionProxySettingsAndroid);
@@ -276,6 +314,8 @@ public class DataReductionProxySettings {
             long nativeDataReductionProxySettingsAndroid, boolean enabled);
     private native long nativeGetDataReductionLastUpdateTime(
             long nativeDataReductionProxySettingsAndroid);
+    private native void nativeClearDataSavingStatistics(
+            long nativeDataReductionProxySettingsAndroid);
     private native ContentLengths nativeGetContentLengths(
             long nativeDataReductionProxySettingsAndroid);
     private native long nativeGetTotalHttpContentLengthSaved(
@@ -290,4 +330,6 @@ public class DataReductionProxySettings {
             long nativeDataReductionProxySettingsAndroid);
     private native String nativeGetHttpProxyList(long nativeDataReductionProxySettingsAndroid);
     private native String nativeGetLastBypassEvent(long nativeDataReductionProxySettingsAndroid);
+    private native void nativeQueryDataUsage(long nativeDataReductionProxySettingsAndroid,
+            List<DataReductionDataUseItem> items, int numDays);
 }