Enable file_handlers and chrome.app.runtime for QuickOffice.

extensions/common/api/_manifest_features.json

Index: extensions/common/api/_manifest_features.json
diff --git a/extensions/common/api/_manifest_features.json b/extensions/common/api/_manifest_features.json
index 60d0a2d00b3144d9178de2e5610ca4571287718e..271eea78558a916f5462fe0caf4de2e1e48bda44 100644
--- a/extensions/common/api/_manifest_features.json
+++ b/extensions/common/api/_manifest_features.json
@@ -6,6 +6,15 @@
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 
+// To add a new whitelisted ID, SHA-1 it and force it to uppercase. In Bash:
+//
+// $ echo -n "aaaabbbbccccddddeeeeffffgggghhhh" | \
+// sha1sum | tr '[:lower:]' '[:upper:]'
+// 9A0417016F345C934A1A88F55CA17C05014EEEBA  -
+//
+// Google employees: please update http://go/chrome-api-whitelist to map
+// hashes back to ids.
+
 {
   // The default platform app CSP can only be overridden by whitelisted apps.
   // This is a separate key from the top-level content_security_policy one since