Menu hook plumbed through to RequestCoordinator.

chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ChromeContextMenuPopulator.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ChromeContextMenuPopulator.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ChromeContextMenuPopulator.java b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ChromeContextMenuPopulator.java
index ae87636e6c5f53d66916851d22d1c6f36ef27efd..91b760510bfc12d39a46041f301ba7019a30c35e 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ChromeContextMenuPopulator.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ChromeContextMenuPopulator.java
@@ -351,8 +351,9 @@ public class ChromeContextMenuPopulator implements ContextMenuPopulator {
                 helper.startContextMenuDownload(true, false);
             }
         } else if (itemId == R.id.contextmenu_save_offline) {
-            // TODO(petewil): Add code here to save the page offline.
-            Log.d(TAG, "Save an offline copy of the linked page");
+            // TODO(petewil): This is for testing only, remove it once we add

[jianli, 2016/05/06 20:39:03]

nit: avoid adding comment like this. Probably better to say: This is a temporary
hook up point to save a page later. 

[Pete Williamson, 2016/05/06 21:30:28]

Done.

+            // a way to save for later from the Dino page.
+            mDelegate.onSavePageLater(params.getLinkUrl());
         } else if (itemId == R.id.contextmenu_search_by_image) {
             ContextMenuUma.record(params, ContextMenuUma.ACTION_SEARCH_BY_IMAGE);
             helper.searchForImage();