[Android NTP] Move more of the dismissal logic into the tree.

chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsCategoryInfo.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsCategoryInfo.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsCategoryInfo.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsCategoryInfo.java
index e6c76f06703d00f9a68b8c809e17266a9ca4f733..7f333ef22256a8410a369c0c8ef9a9776634b584 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsCategoryInfo.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsCategoryInfo.java
@@ -5,11 +5,15 @@
 package org.chromium.chrome.browser.ntp.cards;
 
 import org.chromium.base.Log;
+import org.chromium.chrome.browser.ntp.ContextMenuManager;
+import org.chromium.chrome.browser.ntp.ContextMenuManager.ContextMenuItemId;
 import org.chromium.chrome.browser.ntp.snippets.CategoryInt;
 import org.chromium.chrome.browser.ntp.snippets.ContentSuggestionsCardLayout.ContentSuggestionsCardLayoutEnum;
 import org.chromium.chrome.browser.ntp.snippets.KnownCategories;
 import org.chromium.chrome.browser.suggestions.SuggestionsNavigationDelegate;
 
+import javax.annotation.Nullable;
+
 /**
  * Contains meta information about a Category. Equivalent of the CategoryInfo class in
  * components/ntp_snippets/category_info.h.
@@ -109,14 +113,32 @@ public class SuggestionsCategoryInfo {
     }
 
     /**
-     * Returns the string to use as description for the status card that is displayed when there
-     * are no suggestions available for the provided category.
+     * Returns the string to use as description for the status card that is displayed when there are
+     * no suggestions available for the provided category.
      */
     public String getNoSuggestionsMessage() {
         return mNoSuggestionsMessage;
     }
 
     /**
+     * @param menuItemId The ID for a context menu item.
+     * @return Whether the given context menu item is supported by this category, or null if that
+     *         decision does not depend on the category.
+     */
+    @Nullable
+    public Boolean isContextMenuItemSupported(@ContextMenuItemId int menuItemId) {
+        if (menuItemId == ContextMenuManager.ID_REMOVE) return null;
+
+        if (mCategory == KnownCategories.RECENT_TABS) return false;
+
+        if (mCategory == KnownCategories.DOWNLOADS) {
+            if (menuItemId == ContextMenuManager.ID_OPEN_IN_INCOGNITO_TAB) return false;
+            if (menuItemId == ContextMenuManager.ID_SAVE_FOR_OFFLINE) return false;
+        }
+        return true;
+    }
+
+    /**
      * Performs the View All action for the provided category, navigating navigating to the view
      * showing all the content.
      */