Source

File: wp-admin/includes/class-wp-plugin-install-list-table.php

protected function get_views() {
		global $tabs, $tab;

		$display_tabs = array();
		foreach ( (array) $tabs as $action => $text ) {
			$current_link_attributes                     = ( $action === $tab ) ? ' class="current" aria-current="page"' : '';
			$href                                        = self_admin_url( 'plugin-install.php?tab=' . $action );
			$display_tabs[ 'plugin-install-' . $action ] = "<a href='$href'$current_link_attributes>$text</a>";
		}
		// No longer a real tab.
		unset( $display_tabs['plugin-install-upload'] );

		return $display_tabs;
	}