diff --git a/chrome/chrome.d.ts b/chrome/chrome.d.ts
index 23ee0d9166..6d4b5c9eec 100755
--- a/chrome/chrome.d.ts
+++ b/chrome/chrome.d.ts
@@ -3,6 +3,8 @@
 // Definitions by: Matthew Kimber <https://github.com/matthewkimber>, otiai10 <https://github.com/otiai10>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
+/// <reference path='../webrtc/MediaStream.d.ts'/>
+
 ////////////////////
 // Alarms
 ////////////////////
@@ -537,6 +539,14 @@ declare module chrome.declarativeWebRequest {
     var onRequest: RequestedEvent;
 }
 
+////////////////////
+// DesktopCapture
+////////////////////
+declare module chrome.desktopCapture {
+    export function chooseDesktopMedia(sources: string[], targetTab?: chrome.tabs.Tab, callback?: (streamId: string) => void): void;
+    export function cancelChooseDesktopMedia(desktopMediaRequestId: number): void;
+}
+
 ////////////////////
 // Dev Tools - Inspected Window
 ////////////////////
@@ -1745,6 +1755,27 @@ declare module chrome.socket {
     export function getNetworkList(callback: (result: NetworkInterface[]) => void): void;
 }
 
+////////////////////
+// TabCapture
+////////////////////
+declare module chrome.tabCapture {
+    interface CaptureInfo {
+        tabId: number;
+        status: string;
+        fullscreen: boolean;
+    }
+
+    interface CaptureOptions {
+        audio?: boolean;
+        video?: boolean;
+        audioConstraints?: MediaTrackConstraints;
+        videoConstraints?: MediaTrackConstraints;
+    }
+
+    export function capture(options: CaptureOptions, callback: (stream: LocalMediaStream) => void): void;
+    export function getCapturedTabs(callback: (result: CaptureInfo[]) => void): void;
+}
+
 ////////////////////
 // Tabs
 ////////////////////