Prepare declarativeContent API for new script injection feature. Added Javascript types and functio…

chrome/common/extensions/api/declarative_content.json

 // Copyright (c) 2012 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.
 
 [
   {
     "namespace": "declarativeContent",
     "description": "Use the <code>chrome.declarativeContent</code> API to take actions depending on the content of a page, without requiring permission to read the page's content.",
     "types": [
       {
@@ skipping 30 matching lines @@
       {
         "id": "ShowPageAction",
         "description": "Declarative event action that shows the extension's $(ref:pageAction page action) while the corresponding conditions are met.  This action can be used without <a href=\"declare_permissions#host-permissions\">host permissions</a>, but the extension must have a page action.  If the extension takes the <a href=\"activeTab.html\">activeTab</a> permission, a click on the page action will grant access to the active tab.",
         "type": "object",
         "properties": {
           "instanceType": {
             "type": "string", "enum": ["declarativeContent.ShowPageAction"],
             "nodoc": true
           }
         }
+      },
+      {
+        "id": "RequestContentScript",
+        "description": "Declarative event action that injects a content script.",
+        "type": "object",
+        "properties": {
+          "css": {
+            "type": "array",
+            "optional": true,
+            "description": "Names of CSS files to be injected as a part of the content script.",
+            "items": { "type": "string" }
+          },
+          "js": {
+            "type": "array",
+            "optional": true,
+            "description": "Names of Javascript files to be injected as a part of the content script.",
+            "items": { "type": "string" }
+          },
+          "allFrames": {
+            "type": "boolean",
+            "optional": true,
+            "description": "Whether the content script runs in all frames of the matching page, or only the top frame. Default is false."
+          },
+          "matchAboutBlank": {
+            "type": "boolean",
+            "optional": true,
+            "description": "Whether to insert the content script on about:blank and about:srcdoc. Default is false."
+          },
+          "instanceType": {
+            "type": "string", "enum": ["declarativeContent.RequestContentScript"],
+            "nodoc": true
+          }
+        }
       }
     ],
     "functions": [
     ],
     "events": [
       {
         "name": "onPageChanged",
         "options": {
           "supportsListeners": false,
           "supportsRules": true,
           "conditions": ["declarativeContent.PageStateMatcher"],
           "actions": [
+            "declarativeContent.RequestContentScript",
             "declarativeContent.ShowPageAction"
           ]
         }
       }
     ]
   }
 ]