Fix copy-paste error: description if Javascript in CSS insertion API

chrome/common/extensions/api/webview.json

 // Copyright (c) 2013 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": "webview",
     "description": "none",
     "dependencies": ["contextMenusInternal"],
     "types": [
@@ skipping 327 matching lines @@
         "description": "Injects JavaScript code into a <webview> page.",
         "parameters": [
           {
             "type": "integer",
             "name": "instanceId",
             "description": "The instance ID of the guest <webview> process."
           },
           {
             "type": "string",
             "name": "src",
-            "description": "The src of the guest <webview> process."
+            "description": "The src of the guest <webview> tag."
           },
           {
             "$ref": "tabs.InjectDetails",
             "name": "details",
             "description": "Details of the script to run."
           },
           {
             "type": "function",
             "name": "callback",
             "optional": true,
             "description": "Called after all the JavaScript has been executed.",
             "parameters": [
               {
                 "name": "result",
                 "optional": true,
                 "type": "array",
                 "items": {"type": "any", "minimum": 0},
                 "description": "The result of the script in every injected frame."
               }
             ]
           }
         ]
       },
       {
         "name": "insertCSS",
         "type": "function",
-        "description": "Injects JavaScript code into a <webview> page.",
+        "description": "Injects CSS into a <webview> page. For details, see the <a href='/extensions/content_scripts#pi'>programmatic injection</a> section of the content scripts doc.",
         "parameters": [
           {
             "type": "integer",
             "name": "instanceId",
             "description": "The instance ID of the guest <webview> process."
           },
           {
             "type": "string",
             "name": "src",
-            "description": "The src of the guest <webview> process."
+            "description": "The src of the guest <webview> tag."
           },
           {
             "$ref": "tabs.InjectDetails",
             "name": "details",
-            "description": "Details of the script to run."
+            "description": "Details of the CSS text to insert."
           },
           {
             "type": "function",
             "name": "callback",
             "optional": true,
-            "description": "Called after all the JavaScript has been executed.",
-            "parameters": [
-              {
-                "name": "result",
-                "optional": true,
-                "type": "array",
-                "items": {"type": "any", "minimum": 0},
-                "description": "The result of the script in every injected frame."
-              }
-            ]
+            "description": "Called when all the CSS has been inserted.",
+            "parameters": []
           }
         ]
       },
       {
         "name": "captureVisibleRegion",
         "type": "function",
         "description": "Captures the visible area of the currently loaded page inside <webview>.",
         "parameters": [
           {
             "type": "integer",
@@ skipping 290 matching lines @@
     "events": [
       {
         "name": "onClicked",
         "type": "function",
         "nodoc": true,
         "$ref": "contextMenusInternal.onClicked"
       }
     ]
   }
 ]
-