Create a new custom class that handles keyboard shortcuts for Custom Tab

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
index 4ae81a1abcb31598b69cc13c93b9ac314ab86dbf..c262be9c406e760ae727231309fedfd8bde09e60 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
@@ -390,8 +390,23 @@ public class CustomTabActivity extends ChromeActivity {
     }
 
     @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        if (!getToolbarManager().isInitialized()) {
+            return super.onKeyDown(keyCode, event);
+        }
+        return KeyboardShortcuts.onKeyDown(event, this, true, false)
+                || super.onKeyDown(keyCode, event);
+    }
+
+    @Override
     public boolean onMenuOrKeyboardAction(int id, boolean fromMenu) {
-        if (id == R.id.open_in_chrome_id) {
+        // Disable creating new tabs, bookmark, history, print, help, focus_url, etc.
+        if (id == R.id.focus_url_bar || id == R.id.all_bookmarks_menu_id
+                || id == R.id.bookmark_this_page_id || id == R.id.print_id || id == R.id.help_id
+                || id == R.id.recent_tabs_menu_id || id == R.id.new_incognito_tab_menu_id
+                || id == R.id.new_tab_menu_id) {
+            return true;
+        } else if (id == R.id.open_in_chrome_id) {
             String url = getTabModelSelector().getCurrentTab().getUrl();
             Intent chromeIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
             chromeIntent.setPackage(getApplicationContext().getPackageName());
@@ -410,9 +425,6 @@ public class CustomTabActivity extends ChromeActivity {
                 RecordUserAction.record("MobileShortcutFindInPage");
             }
             return true;
-        } else if (id == R.id.focus_url_bar) {
-            // Do nothing because url bar in custom tabs is not editable.
-            return true;
         }
         return super.onMenuOrKeyboardAction(id, fromMenu);
     }