Merge "AppCompatActionBar: use findClass to test presence" into mnc-ub-dev am: 42a893b5

            Class[] constructorParams = {View.class};

            Object[] constructorArgs = {getDecorContent()};

            LayoutlibCallback callback = params.getLayoutlibCallback();

            // First try to load the class as was available before appcompat v23.1.1, without

            // logging warnings.

            // Check if the old action bar class is present.

            String actionBarClass = WINDOW_ACTION_BAR_CLASS;

            try {

                mWindowDecorActionBar = callback.loadClass(WINDOW_ACTION_BAR_CLASS,

                        constructorParams, constructorArgs);

            } catch (ClassNotFoundException ignore) {

            }

            if (mWindowDecorActionBar == null) {

                // If failed, load the new class, while logging warnings.

                mWindowDecorActionBar = callback.loadView(WINDOW_ACTION_BAR_CLASS_NEW,

                        constructorParams, constructorArgs);

                callback.findClass(actionBarClass);

            } catch (ClassNotFoundException expected) {

                // Failed to find the old class, use the newer one.

                actionBarClass = WINDOW_ACTION_BAR_CLASS_NEW;

            }

            mWindowDecorActionBar = callback.loadView(actionBarClass,

                    constructorParams, constructorArgs);

            mWindowActionBarClass = mWindowDecorActionBar == null ? null :

                    mWindowDecorActionBar.getClass();

            setupActionBar();