Implement externally_connectable! Web pages can now communicate directly with

chrome/common/extensions/api/_api_features.json

Index: chrome/common/extensions/api/_api_features.json
diff --git a/chrome/common/extensions/api/_api_features.json b/chrome/common/extensions/api/_api_features.json
index f90e8864236047a634b2b6465ef86377e76b27f5..a20c54413a2835ef9acb585bcdcbd53b10c787e7 100644
--- a/chrome/common/extensions/api/_api_features.json
+++ b/chrome/common/extensions/api/_api_features.json
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// See c/c/e/features/* to understand this file, in particular feature.h,
+// simple_feature.h, and base_feature_provider.h.
+
 {
   "app": {
     "channel": "stable",
@@ -71,7 +74,8 @@
   "runtime.connect": {
     "channel": "stable",
     "extension_types": ["extension", "packaged_app", "platform_app"],
-    "contexts": ["blessed_extension", "unblessed_extension", "content_script"]
+    "contexts": "all",
+    "matches": ["<all_urls>"]
   },
   "runtime.getManifest": {
     "channel": "stable",
@@ -116,7 +120,8 @@
   "runtime.sendMessage": {
     "channel": "stable",
     "extension_types": ["extension", "packaged_app", "platform_app"],
-    "contexts": ["blessed_extension", "unblessed_extension", "content_script"]
+    "contexts": "all",
+    "matches": ["<all_urls>"]
   },
   "runtime.setUninstallUrl": {
     "channel": "dev",