Enable webview tag in webui

extensions/common/api/_api_features.json

Index: extensions/common/api/_api_features.json
diff --git a/extensions/common/api/_api_features.json b/extensions/common/api/_api_features.json
index dd5b3a72fccb23b44263ddaa956dbd7dc4678f71..eb80f5cff7209ef66b354972784020a69d226c18 100644
--- a/extensions/common/api/_api_features.json
+++ b/extensions/common/api/_api_features.json
@@ -73,16 +73,12 @@
       "channel": "stable",
       "contexts": ["blessed_extension"]
     }, {
-      // Component extensions can use the guestViewInternal API from iframes.

[Ken Rockot(use gerrit already), 2014/09/22 20:47:33]

Why are you deleting this feature?

[guohui, 2014/09/22 20:58:59]

same as i explained in the other file, i added this feature for some old code
(embed webview in a component extension that is in turn embedded in a webui
page) that has been completely removed.

-      "location": "component",
-      "internal": true,
-      "dependencies": ["permission:webview"],
-      "contexts": ["unblessed_extension"]
-    }, {
       "internal": true,
       "channel": "trunk",
       "contexts": ["webui"],
-      "matches": ["chrome://extensions-frame/*", "chrome://extensions/*"]
+      "matches": ["chrome://extensions-frame/*",

[Ken Rockot(use gerrit already), 2014/09/22 20:47:33]

formatting nit: All other instances of multiline collections in features files
use the format:

  "foo": [
    "bar",
    "baz"
  ]

Please do this here.

[guohui, 2014/09/22 20:58:59]

Done.

+                  "chrome://extensions/*",
+                  "chrome://chrome-signin/*"]
     }
   ],
   "hid": {
@@ -252,10 +248,9 @@
     "dependencies": ["permission:webview"],
     "contexts": ["blessed_extension"]
   }, {
-    // Component extensions can use the webViewInternal API from iframes.

[Ken Rockot(use gerrit already), 2014/09/22 20:47:32]

And this one?

[guohui, 2014/09/22 20:58:59]

same as above.

-    "location": "component",
     "internal": true,
-    "dependencies": ["permission:webview"],
-    "contexts": ["unblessed_extension"]
+    "channel": "dev",
+    "contexts": ["webui"],
+    "matches": ["chrome://chrome-signin/*"]
   }]
 }