Send an onInstalled event for shared module update

extensions/common/api/runtime.json

Index: extensions/common/api/runtime.json
diff --git a/extensions/common/api/runtime.json b/extensions/common/api/runtime.json
index a5a32555750aa2628e45f99e84725605db44a4c8..ccb63a58b1e978e86b34e2421ce719488a892d48 100644
--- a/extensions/common/api/runtime.json
+++ b/extensions/common/api/runtime.json
@@ -352,13 +352,18 @@
             "properties": {
               "reason": {
                 "type": "string",
-                "enum": ["install", "update", "chrome_update"],
+                "enum": ["install", "update", "chrome_update", "shared_module_update"],
                 "description": "The reason that this event is being dispatched."
               },
               "previousVersion": {
                 "type": "string",
                 "optional": true,
                 "description": "Indicates the previous version of the extension, which has just been updated. This is present only if 'reason' is 'update'."
+              },
+              "id": {
+                "type": "string",
+                "optional": true,
+                "description": "Indicates the ID of the imported shared module extension which updated. This is present only if 'reason' is 'shared_module_update'."
               }
             }
           }