Add material design toggle ripple element.

ui/file_manager/file_manager_resources.grd

Index: ui/file_manager/file_manager_resources.grd
diff --git a/ui/file_manager/file_manager_resources.grd b/ui/file_manager/file_manager_resources.grd
index 63670a2995a54164097b49e3a4601c26ce0a07b6..6a0d2b5afff421e4682131a1e79443259d561108 100644
--- a/ui/file_manager/file_manager_resources.grd
+++ b/ui/file_manager/file_manager_resources.grd
@@ -50,6 +50,10 @@
       <include name="IDR_FILE_MANAGER_TEST_UTIL_BASE_JS" file="file_manager/background/js/test_util_base.js" flattenhtml="false" type="BINDATA" />
       <include name="IDR_FILE_MANAGER_VOLUME_MANAGER_JS" file="file_manager/background/js/volume_manager.js" flattenhtml="false" type="BINDATA" />
 
+      <!-- Polymer elements -->
+      <include name="IDR_FILE_MANAGER_ELEMENTS_FILES_TOGGLE_RIPPLE_HTML" file="file_manager/foreground/elements/files_toggle_ripple.html" type="BINDATA" />
+      <include name="IDR_FILE_MANAGER_ELEMENTS_FILES_TOGGLE_RIPPLE_JS" file="file_manager/foreground/elements/files_toggle_ripple.js" type="BINDATA" />
+
       <!-- Scripts referred by the gallery app. -->
       <include name="IDR_FILE_MANAGER_FILE_TYPE_JS" file="file_manager/common/js/file_type.js" flattenhtml="false" type="BINDATA" />