Flag for Background Loading of Offline Pages.

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageBridge.java
index ebda57ff723507ae1d098d500a48f8ec882686a5..9362aa1b724fac5fd721e2793759b9ef0fd92af5 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageBridge.java
@@ -200,6 +200,15 @@ public final class OfflinePageBridge {
     }
 
     /**
+     * @return True if the offline pages feature is enabled, regardless whether bookmark or saved
+     *     page shown in UI strings.
+     */
+    public static boolean isBackgroundLoadingEnabled() {
+        ThreadUtils.assertOnUiThread();
+        return nativeIsOfflinePagesBackgroundLoadingEnabled();
+    }
+
+    /**
      * @return True if an offline copy of the given URL can be saved.
      */
     public static boolean canSavePage(String url) {
@@ -533,6 +542,7 @@ public final class OfflinePageBridge {
     }
 
     private static native int nativeGetFeatureMode();
+    private static native boolean nativeIsOfflinePagesBackgroundLoadingEnabled();

[Alexei Svitkine (slow), 2016/03/14 15:42:48]

Optional nit: Up to you, but instead of adding the wrapper, you can add your
feature to here:

https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/and...

And then you can query it via ChromeFeatureList.java API. But your current set
up is OK too.

[Pete Williamson, 2016/03/14 17:36:51]

Done.

     private static native boolean nativeCanSavePage(String url);
     private static native OfflinePageBridge nativeGetOfflinePageBridgeForProfile(Profile profile);