[Extensions API] Remove inline enums

extensions/common/api/runtime.json

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Note: Many of these functions and events are implemented by hand and should
 // not elicit any code generation from the schema compiler. These items are
 // marked "nocompile."
 [
   {
     "namespace": "runtime",
@@ skipping 26 matching lines @@
         "properties": {
           "tab": {"$ref": "tabs.Tab", "optional": true, "description": "The $(ref:tabs.Tab) which opened the connection, if any. This property will <strong>only</strong> be present when the connection was opened from a tab (including content scripts), and <strong>only</strong> if the receiver is an extension, not an app.", "extension_types": ["extension", "legacy_packaged_app"]},
           "frameId": {"type": "integer", "optional": true, "description": "The <a href='webNavigation#frame_ids'>frame</a> that opened the connection. 0 for top-level frames, positive for child frames. This will only be set when <code>tab</code> is set.", "extension_types": ["extension", "legacy_packaged_app"]},
           "guestProcessId": {"type": "integer", "optional": true, "nodoc": true, "description": "The guest process id of the requesting webview, if available. Only available for component extensions.", "extension_types": ["extension"]},
           "id": {"type": "string", "optional": true, "description": "The ID of the extension or app that opened the connection, if any."},
           "url": {"type": "string", "optional": true, "description": "The URL of the page or frame that opened the connection. If the sender is in an iframe, it will be iframe's URL not the URL of the page which hosts it."},
           "tlsChannelId": {"type": "string", "optional": true, "description": "The TLS channel ID of the page or frame that opened the connection, if requested by the extension or app, and if available."}
         }
       },
       {
+        "id": "PlatformOs",
+        "type": "string",
+        "description": "The operating system chrome is running on.",
+        "enum": ["mac", "win", "android", "cros", "linux", "openbsd"]
+      },
+      {
+        "id": "PlatformArch",
+        "type": "string",
+        "enum": ["arm", "x86-32", "x86-64"],
+        "description": "The machine's processor architecture."
+      },
+      {
+        "id": "PlatformNaclArch",
+        "description": "The native client architecture. This may be different from arch on some platforms.",
+        "type": "string",
+        "enum": ["arm", "x86-32", "x86-64"]
+      },
+      {
         "id": "PlatformInfo",
         "type": "object",
         "description": "An object containing information about the current platform.",
         "properties": {
           "os": {
-            "type": "string",
-            "description": "The operating system chrome is running on.",
-            "enum": ["mac", "win", "android", "cros", "linux", "openbsd"]
+            "$ref": "PlatformOs",
+            "description": "The operating system chrome is running on."
           },
           "arch": {
-            "type": "string",
-            "enum": ["arm", "x86-32", "x86-64"],
+            "$ref": "PlatformArch",
             "description": "The machine's processor architecture."
           },
           "nacl_arch" : {
             "description": "The native client architecture. This may be different from arch on some platforms.",
-            "type": "string",
-            "enum": ["arm", "x86-32", "x86-64"]
+            "$ref": "PlatformNaclArch"
           }
         }
+      },
+      {
+        "id": "RequestUpdateCheckStatus",
+        "type": "string",
+        "enum": ["throttled", "no_update", "update_available"],
+        "description": "Result of the update check."
+      },
+      {
+        "id": "OnInstalledReason",
+        "type": "string",
+        "enum": ["install", "update", "chrome_update", "shared_module_update"],
+        "description": "The reason that this event is being dispatched."
+      },
+      {
+        "id": "OnRestartRequiredReason",
+        "type": "string",
+        "description": "The reason that the event is being dispatched. 'app_update' is used when the restart is needed because the application is updated to a newer version. 'os_update' is used when the restart is needed because the browser/OS is updated to a newer version. 'periodic' is used when the system runs for more than the permitted uptime set in the enterprise policy.",
+        "enum": ["app_update", "os_update", "periodic"]
       }
     ],
     "properties": {
       "lastError": {
         "type": "object",
         "optional": true,
         "description": "This will be defined during an API method callback if there was an error",
         "properties": {
           "message": {
             "optional": true,
@@ skipping 94 matching lines @@
         "name": "requestUpdateCheck",
         "type": "function",
         "description": "Requests an update check for this app/extension.",
         "parameters": [
           {
             "type": "function",
             "name": "callback",
             "parameters": [
               {
                 "name": "status",
-                "type": "string",
-                "enum": ["throttled", "no_update", "update_available"],
+                "$ref": "RequestUpdateCheckStatus",
                 "description": "Result of the update check."
               },
               {
                 "name": "details",
                 "type": "object",
                 "optional": true,
                 "properties": {
                   "version": {
                     "type": "string",
                     "description": "The version of the available update."
@@ skipping 164 matching lines @@
       {
         "name": "onInstalled",
         "type": "function",
         "description": "Fired when the extension is first installed, when the extension is updated to a new version, and when Chrome is updated to a new version.",
         "parameters": [
           {
             "type": "object",
             "name": "details",
             "properties": {
               "reason": {
-                "type": "string",
-                "enum": ["install", "update", "chrome_update", "shared_module_update"],
+                "$ref": "OnInstalledReason",
                 "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,
@@ skipping 96 matching lines @@
           "optional": true,
           "description": "Return true from the event listener if you wish to call <code>sendResponse</code> after the event listener returns."
         }
       },
       {
         "name": "onRestartRequired",
         "type": "function",
         "description": "Fired when an app or the device that it runs on needs to be restarted. The app should close all its windows at its earliest convenient time to let the restart to happen. If the app does nothing, a restart will be enforced after a 24-hour grace period has passed. Currently, this event is only fired for Chrome OS kiosk apps.",
         "parameters": [
           {
-            "type": "string",
+            "$ref": "OnRestartRequiredReason",
             "name": "reason",
-            "description": "The reason that the event is being dispatched. 'app_update' is used when the restart is needed because the application is updated to a newer version. 'os_update' is used when the restart is needed because the browser/OS is updated to a newer version. 'periodic' is used when the system runs for more than the permitted uptime set in the enterprise policy.",
-            "enum": ["app_update", "os_update", "periodic"]
+            "description": "The reason that the event is being dispatched."
           }
         ]
       }
     ]
   }
 ]