Update tabCapture API docs with browser action info.

chrome/common/extensions/api/tab_capture.idl

 // 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.
 
 // An API for tab media streams.
 
 namespace tabCapture {
 
   enum TabCaptureState {
     pending,
@@ skipping 29 matching lines @@
     MediaStreamConstraint? videoConstraints;
   };
 
   callback GetTabMediaCallback =
       void ([instanceOf=LocalMediaStream] object stream);
 
   callback GetCapturedTabsCallback = void (CaptureInfo[] result);
 
   interface Functions {
     // Captures the visible area of the currently active tab.
-    // Extensions must have the "tabCapture" permission to use this method.
+    // Extensions must have the "tabCapture" permission to use this method. Use

[not at google - send to devlin, 2013/04/18 20:17:13]

nit: "extensions must have the tabCapture permission to use this method" is
implied by this being the tabCapture API. I'd just delete that sentence.

[justinlin, 2013/04/18 21:06:44]

Done.

+    // of this method for the currently active tab can only be granted
+    // through a user action. See:

[not at google - send to devlin, 2013/04/18 20:17:13]

"User action" isn't quite accurate; it might imply that the API calls can only
be made during a user action, when in fact they can be made at any time during
of after a user action.

Something like "This method can only be used on a page which the extension has
been invoked on, similar to the way that <a href="activeTab">activeTab</a>
works."

[justinlin, 2013/04/18 21:06:44]

Done, something similar.

+    // http://developer.chrome.com/extensions/activeTab.html

[not at google - send to devlin, 2013/04/18 20:17:13]

could you make this

<a href="activeTab.html">activeTab</a>

+    // Note that Chrome internal pages cannot be captured.
     // |options| : Configures the returned media stream.
     // |callback| : Callback with either the stream returned or null.
     static void capture(CaptureOptions options,
                         GetTabMediaCallback callback);
 
     // Returns a list of tabs that have requested capture or are being
     // captured, i.e. status != stopped and status != error.
     // This allows extensions to inform the user that there is an existing
     // tab capture that would prevent a new tab capture from succeeding (or
     // to prevent redundant requests for the same tab).
     static void getCapturedTabs(GetCapturedTabsCallback callback);
   };
 
   interface Events {
     // Event fired when the capture status of a tab changes.
     // This allows extension authors to keep track of the capture status of
     // tabs to keep UI elements like page actions and infobars in sync.
     static void onStatusChanged(CaptureInfo info);
   };
 
 };