Add spellcheck and word suggestion to the prediction service

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index f34e29769475e520b1830fd030b02a96a3eb5e99..2fb47c3ed412d9e25cfec08d5abb87f2df580fd7 100644
--- a/DEPS
+++ b/DEPS
@@ -401,4 +401,15 @@ hooks = [
                 '-d', 'src/services/keyboard_native/res',
     ],
   },
+  # Pull prediction resources using checked-in hashes.
+  {
+    'name': 'prediction_resources',
+    'pattern': '',
+    'action': [ 'download_from_google_storage',
+                '--no_resume',
+                '--no_auth',
+                '--bucket', 'mojo/prediction',
+                '-d', 'src/services/prediction/res',
+    ],
+  },
 ]