Menu hook plumbed through to RequestCoordinator.

chrome/android/java/src/org/chromium/chrome/browser/tab/TabContextMenuItemDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/TabContextMenuItemDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/TabContextMenuItemDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/TabContextMenuItemDelegate.java
index 2558559aa027d96eeedb0899dbaa01191f4fb512..c65885e46b5e83f9b0ad66dc81dd60ec13b3a17f 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/TabContextMenuItemDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/TabContextMenuItemDelegate.java
@@ -13,6 +13,8 @@ import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.contextmenu.ContextMenuItemDelegate;
 import org.chromium.chrome.browser.multiwindow.MultiWindowUtils;
 import org.chromium.chrome.browser.net.spdyproxy.DataReductionProxySettings;
+import org.chromium.chrome.browser.offlinepages.ClientId;
+import org.chromium.chrome.browser.offlinepages.OfflinePageBridge;
 import org.chromium.chrome.browser.preferences.PrefServiceBridge;
 import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
 import org.chromium.chrome.browser.tabmodel.document.TabDelegate;
@@ -24,6 +26,7 @@ import org.chromium.ui.base.PageTransition;
 
 import java.net.URI;
 import java.util.Locale;
+import java.util.Random;
 
 /**
  * A default {@link ContextMenuItemDelegate} that supports the context menu functionality in Tab.
@@ -164,6 +167,15 @@ public class TabContextMenuItemDelegate implements ContextMenuItemDelegate {
         }
     }
 
+    @Override
+    public void onSavePageLater(String linkUrl) {
+        OfflinePageBridge bridge = OfflinePageBridge.getForProfile(mTab.getProfile());
+        Random random = new Random();
+        long offline_id = random.nextLong();
+        ClientId clientId = new ClientId("async_loading", Long.toString(offline_id));
+        bridge.savePageLater(linkUrl, clientId);
+    }
+
     /**
      * Checks if spdy proxy is enabled for input url.
      * @param url Input url to check for spdy setting.