Add SetImageData api to chrome.clipboard.

extensions/common/api/_api_features.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.
 
 // This features file defines extension APIs implemented under src/extensions.
 // See chrome/common/extensions/api/_features.md to understand this file, as
 // well as feature.h, simple_feature.h, and base_feature_provider.h.
 //
 // Note that specifying "web_page", "blessed_web_page", or "all" as a context
 // type will require manually updating chrome/renderer/resources/dispatcher.cc.
@@ skipping 95 matching lines @@
       "chrome://md-settings/*",
       "chrome://settings/*",
       "chrome://settings-frame/*"
     ]
   }],
   "bluetoothSocket": {
     "dependencies": ["manifest:bluetooth"],
     "contexts": ["blessed_extension"]
   },
   "clipboard": {
-    "dependencies": ["permission:clipboard", "permission:clipboardRead"],
+    "dependencies": [
+    "permission:clipboard",
+    "permission:clipboardRead",
+    "permission:clipboardWrite"
+    ],
     "contexts": ["blessed_extension"]       
   },
   "declarativeWebRequest": {
     "dependencies": ["permission:declarativeWebRequest"],
     "contexts": ["blessed_extension"]
   },
   "diagnostics": {
     "dependencies": ["permission:diagnostics"],
     "extension_types": ["platform_app"],
     "contexts": ["blessed_extension"]
@@ skipping 340 matching lines @@
   }, {
     "channel": "stable",
     "contexts": ["webui"],
     "matches": [
       "chrome://chrome-signin/*",
       "chrome://media-router/*",
       "chrome://oobe/*"
     ]
   }]
 }